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authorMark Brown <broonie@opensource.wolfsonmicro.com>2012-12-15 23:56:43 +0900
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-12-15 23:56:43 +0900
commit326b06a8a9b09d6d9a276fd550b6b6bb138e9a47 (patch)
treeb9bdcb0bd635b91258cec09c981af2c5dcc0f683 /arch/arm
parent92b2e81d6f95bcee386abac4c4389f5b950f7bb9 (diff)
parent9bffb1fb7c22c96d51d4ba06e2e023dd568a5872 (diff)
downloadlinux-326b06a8a9b09d6d9a276fd550b6b6bb138e9a47.tar.bz2
Merge remote-tracking branch 'asoc/topic/core' into asoc-next
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/Kconfig1
-rw-r--r--arch/arm/boot/compressed/head.S14
-rw-r--r--arch/arm/common/timer-sp.c2
-rw-r--r--arch/arm/mach-dove/include/mach/pm.h2
-rw-r--r--arch/arm/mach-dove/irq.c14
-rw-r--r--arch/arm/mach-ixp4xx/common-pci.c1
-rw-r--r--arch/arm/mach-ixp4xx/common.c13
-rw-r--r--arch/arm/mach-ixp4xx/goramo_mlr.c3
-rw-r--r--arch/arm/mach-ixp4xx/include/mach/debug-macro.S4
-rw-r--r--arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h46
-rw-r--r--arch/arm/mach-ixp4xx/include/mach/qmgr.h12
-rw-r--r--arch/arm/mach-ixp4xx/ixp4xx_npe.c9
-rw-r--r--arch/arm/mach-ixp4xx/ixp4xx_qmgr.c12
-rw-r--r--arch/arm/mach-kirkwood/pcie.c11
-rw-r--r--arch/arm/mm/proc-v6.S2
-rw-r--r--arch/arm/plat-s3c24xx/dma.c9
16 files changed, 87 insertions, 68 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ade7e924bef5..9759fec0b704 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -547,6 +547,7 @@ config ARCH_KIRKWOOD
select CPU_FEROCEON
select GENERIC_CLOCKEVENTS
select PCI
+ select PCI_QUIRKS
select PLAT_ORION_LEGACY
help
Support for the following Marvell Kirkwood series SoCs:
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index 90275f036cd1..49ca86e37b8d 100644
--- a/arch/arm/boot/compressed/head.S
+++ b/arch/arm/boot/compressed/head.S
@@ -652,6 +652,15 @@ __setup_mmu: sub r3, r4, #16384 @ Page directory size
mov pc, lr
ENDPROC(__setup_mmu)
+@ Enable unaligned access on v6, to allow better code generation
+@ for the decompressor C code:
+__armv6_mmu_cache_on:
+ mrc p15, 0, r0, c1, c0, 0 @ read SCTLR
+ bic r0, r0, #2 @ A (no unaligned access fault)
+ orr r0, r0, #1 << 22 @ U (v6 unaligned access model)
+ mcr p15, 0, r0, c1, c0, 0 @ write SCTLR
+ b __armv4_mmu_cache_on
+
__arm926ejs_mmu_cache_on:
#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
mov r0, #4 @ put dcache in WT mode
@@ -694,6 +703,9 @@ __armv7_mmu_cache_on:
bic r0, r0, #1 << 28 @ clear SCTLR.TRE
orr r0, r0, #0x5000 @ I-cache enable, RR cache replacement
orr r0, r0, #0x003c @ write buffer
+ bic r0, r0, #2 @ A (no unaligned access fault)
+ orr r0, r0, #1 << 22 @ U (v6 unaligned access model)
+ @ (needed for ARM1176)
#ifdef CONFIG_MMU
#ifdef CONFIG_CPU_ENDIAN_BE8
orr r0, r0, #1 << 25 @ big-endian page tables
@@ -914,7 +926,7 @@ proc_types:
.word 0x0007b000 @ ARMv6
.word 0x000ff000
- W(b) __armv4_mmu_cache_on
+ W(b) __armv6_mmu_cache_on
W(b) __armv4_mmu_cache_off
W(b) __armv6_mmu_cache_flush
diff --git a/arch/arm/common/timer-sp.c b/arch/arm/common/timer-sp.c
index df13a3ffff35..9d2d3ba339ff 100644
--- a/arch/arm/common/timer-sp.c
+++ b/arch/arm/common/timer-sp.c
@@ -162,7 +162,6 @@ static struct clock_event_device sp804_clockevent = {
.set_mode = sp804_set_mode,
.set_next_event = sp804_set_next_event,
.rating = 300,
- .cpumask = cpu_all_mask,
};
static struct irqaction sp804_timer_irq = {
@@ -185,6 +184,7 @@ void __init sp804_clockevents_init(void __iomem *base, unsigned int irq,
clkevt_reload = DIV_ROUND_CLOSEST(rate, HZ);
evt->name = name;
evt->irq = irq;
+ evt->cpumask = cpu_possible_mask;
setup_irq(irq, &sp804_timer_irq);
clockevents_config_and_register(evt, rate, 0xf, 0xffffffff);
diff --git a/arch/arm/mach-dove/include/mach/pm.h b/arch/arm/mach-dove/include/mach/pm.h
index 7bcd0dfce4b1..b47f75038686 100644
--- a/arch/arm/mach-dove/include/mach/pm.h
+++ b/arch/arm/mach-dove/include/mach/pm.h
@@ -63,7 +63,7 @@ static inline int pmu_to_irq(int pin)
static inline int irq_to_pmu(int irq)
{
- if (IRQ_DOVE_PMU_START < irq && irq < NR_IRQS)
+ if (IRQ_DOVE_PMU_START <= irq && irq < NR_IRQS)
return irq - IRQ_DOVE_PMU_START;
return -EINVAL;
diff --git a/arch/arm/mach-dove/irq.c b/arch/arm/mach-dove/irq.c
index 087711524e8a..bc4344aa1009 100644
--- a/arch/arm/mach-dove/irq.c
+++ b/arch/arm/mach-dove/irq.c
@@ -46,8 +46,20 @@ static void pmu_irq_ack(struct irq_data *d)
int pin = irq_to_pmu(d->irq);
u32 u;
+ /*
+ * The PMU mask register is not RW0C: it is RW. This means that
+ * the bits take whatever value is written to them; if you write
+ * a '1', you will set the interrupt.
+ *
+ * Unfortunately this means there is NO race free way to clear
+ * these interrupts.
+ *
+ * So, let's structure the code so that the window is as small as
+ * possible.
+ */
u = ~(1 << (pin & 31));
- writel(u, PMU_INTERRUPT_CAUSE);
+ u &= readl_relaxed(PMU_INTERRUPT_CAUSE);
+ writel_relaxed(u, PMU_INTERRUPT_CAUSE);
}
static struct irq_chip pmu_irq_chip = {
diff --git a/arch/arm/mach-ixp4xx/common-pci.c b/arch/arm/mach-ixp4xx/common-pci.c
index 1694f01ce2b6..6d6bde3e15fa 100644
--- a/arch/arm/mach-ixp4xx/common-pci.c
+++ b/arch/arm/mach-ixp4xx/common-pci.c
@@ -410,6 +410,7 @@ void __init ixp4xx_pci_preinit(void)
* Enable the IO window to be way up high, at 0xfffffc00
*/
local_write_config(PCI_BASE_ADDRESS_5, 4, 0xfffffc01);
+ local_write_config(0x40, 4, 0x000080FF); /* No TRDY time limit */
} else {
printk("PCI: IXP4xx is target - No bus scan performed\n");
}
diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c
index fdf91a160884..8c0c0e2d0727 100644
--- a/arch/arm/mach-ixp4xx/common.c
+++ b/arch/arm/mach-ixp4xx/common.c
@@ -67,15 +67,12 @@ static struct map_desc ixp4xx_io_desc[] __initdata = {
.pfn = __phys_to_pfn(IXP4XX_PCI_CFG_BASE_PHYS),
.length = IXP4XX_PCI_CFG_REGION_SIZE,
.type = MT_DEVICE
- },
-#ifdef CONFIG_DEBUG_LL
- { /* Debug UART mapping */
- .virtual = (unsigned long)IXP4XX_DEBUG_UART_BASE_VIRT,
- .pfn = __phys_to_pfn(IXP4XX_DEBUG_UART_BASE_PHYS),
- .length = IXP4XX_DEBUG_UART_REGION_SIZE,
+ }, { /* Queue Manager */
+ .virtual = (unsigned long)IXP4XX_QMGR_BASE_VIRT,
+ .pfn = __phys_to_pfn(IXP4XX_QMGR_BASE_PHYS),
+ .length = IXP4XX_QMGR_REGION_SIZE,
.type = MT_DEVICE
- }
-#endif
+ },
};
void __init ixp4xx_map_io(void)
diff --git a/arch/arm/mach-ixp4xx/goramo_mlr.c b/arch/arm/mach-ixp4xx/goramo_mlr.c
index b800a031207c..53b8348dfcc2 100644
--- a/arch/arm/mach-ixp4xx/goramo_mlr.c
+++ b/arch/arm/mach-ixp4xx/goramo_mlr.c
@@ -15,6 +15,7 @@
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/pci.h>
+#include <asm/system_info.h>
#define SLOT_ETHA 0x0B /* IDSEL = AD21 */
#define SLOT_ETHB 0x0C /* IDSEL = AD20 */
@@ -329,7 +330,7 @@ static struct platform_device device_hss_tab[] = {
};
-static struct platform_device *device_tab[6] __initdata = {
+static struct platform_device *device_tab[7] __initdata = {
&device_flash, /* index 0 */
};
diff --git a/arch/arm/mach-ixp4xx/include/mach/debug-macro.S b/arch/arm/mach-ixp4xx/include/mach/debug-macro.S
index 8c9f8d564492..ff686cbc5df4 100644
--- a/arch/arm/mach-ixp4xx/include/mach/debug-macro.S
+++ b/arch/arm/mach-ixp4xx/include/mach/debug-macro.S
@@ -17,8 +17,8 @@
#else
mov \rp, #0
#endif
- orr \rv, \rp, #0xff000000 @ virtual
- orr \rv, \rv, #0x00b00000
+ orr \rv, \rp, #0xfe000000 @ virtual
+ orr \rv, \rv, #0x00f00000
orr \rp, \rp, #0xc8000000 @ physical
.endm
diff --git a/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h b/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h
index eb68b61ce975..c5bae9c035d5 100644
--- a/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h
+++ b/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h
@@ -30,51 +30,43 @@
*
* 0x50000000 0x10000000 ioremap'd EXP BUS
*
- * 0x6000000 0x00004000 ioremap'd QMgr
+ * 0xC8000000 0x00013000 0xFEF00000 On-Chip Peripherals
*
- * 0xC0000000 0x00001000 0xffbff000 PCI CFG
+ * 0xC0000000 0x00001000 0xFEF13000 PCI CFG
*
- * 0xC4000000 0x00001000 0xffbfe000 EXP CFG
+ * 0xC4000000 0x00001000 0xFEF14000 EXP CFG
*
- * 0xC8000000 0x00013000 0xffbeb000 On-Chip Peripherals
+ * 0x60000000 0x00004000 0xFEF15000 QMgr
*/
/*
* Queue Manager
*/
-#define IXP4XX_QMGR_BASE_PHYS (0x60000000)
-#define IXP4XX_QMGR_REGION_SIZE (0x00004000)
+#define IXP4XX_QMGR_BASE_PHYS 0x60000000
+#define IXP4XX_QMGR_BASE_VIRT IOMEM(0xFEF15000)
+#define IXP4XX_QMGR_REGION_SIZE 0x00004000
/*
- * Expansion BUS Configuration registers
+ * Peripheral space, including debug UART. Must be section-aligned so that
+ * it can be used with the low-level debug code.
*/
-#define IXP4XX_EXP_CFG_BASE_PHYS (0xC4000000)
-#define IXP4XX_EXP_CFG_BASE_VIRT IOMEM(0xFFBFE000)
-#define IXP4XX_EXP_CFG_REGION_SIZE (0x00001000)
+#define IXP4XX_PERIPHERAL_BASE_PHYS 0xC8000000
+#define IXP4XX_PERIPHERAL_BASE_VIRT IOMEM(0xFEF00000)
+#define IXP4XX_PERIPHERAL_REGION_SIZE 0x00013000
/*
* PCI Config registers
*/
-#define IXP4XX_PCI_CFG_BASE_PHYS (0xC0000000)
-#define IXP4XX_PCI_CFG_BASE_VIRT IOMEM(0xFFBFF000)
-#define IXP4XX_PCI_CFG_REGION_SIZE (0x00001000)
-
-/*
- * Peripheral space
- */
-#define IXP4XX_PERIPHERAL_BASE_PHYS (0xC8000000)
-#define IXP4XX_PERIPHERAL_BASE_VIRT IOMEM(0xFFBEB000)
-#define IXP4XX_PERIPHERAL_REGION_SIZE (0x00013000)
+#define IXP4XX_PCI_CFG_BASE_PHYS 0xC0000000
+#define IXP4XX_PCI_CFG_BASE_VIRT IOMEM(0xFEF13000)
+#define IXP4XX_PCI_CFG_REGION_SIZE 0x00001000
/*
- * Debug UART
- *
- * This is basically a remap of UART1 into a region that is section
- * aligned so that it * can be used with the low-level debug code.
+ * Expansion BUS Configuration registers
*/
-#define IXP4XX_DEBUG_UART_BASE_PHYS (0xC8000000)
-#define IXP4XX_DEBUG_UART_BASE_VIRT IOMEM(0xffb00000)
-#define IXP4XX_DEBUG_UART_REGION_SIZE (0x00001000)
+#define IXP4XX_EXP_CFG_BASE_PHYS 0xC4000000
+#define IXP4XX_EXP_CFG_BASE_VIRT 0xFEF14000
+#define IXP4XX_EXP_CFG_REGION_SIZE 0x00001000
#define IXP4XX_EXP_CS0_OFFSET 0x00
#define IXP4XX_EXP_CS1_OFFSET 0x04
diff --git a/arch/arm/mach-ixp4xx/include/mach/qmgr.h b/arch/arm/mach-ixp4xx/include/mach/qmgr.h
index 9e7cad2d54cb..4de8da536dbb 100644
--- a/arch/arm/mach-ixp4xx/include/mach/qmgr.h
+++ b/arch/arm/mach-ixp4xx/include/mach/qmgr.h
@@ -86,7 +86,7 @@ void qmgr_release_queue(unsigned int queue);
static inline void qmgr_put_entry(unsigned int queue, u32 val)
{
- extern struct qmgr_regs __iomem *qmgr_regs;
+ struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
#if DEBUG_QMGR
BUG_ON(!qmgr_queue_descs[queue]); /* not yet requested */
@@ -99,7 +99,7 @@ static inline void qmgr_put_entry(unsigned int queue, u32 val)
static inline u32 qmgr_get_entry(unsigned int queue)
{
u32 val;
- extern struct qmgr_regs __iomem *qmgr_regs;
+ const struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
val = __raw_readl(&qmgr_regs->acc[queue][0]);
#if DEBUG_QMGR
BUG_ON(!qmgr_queue_descs[queue]); /* not yet requested */
@@ -112,14 +112,14 @@ static inline u32 qmgr_get_entry(unsigned int queue)
static inline int __qmgr_get_stat1(unsigned int queue)
{
- extern struct qmgr_regs __iomem *qmgr_regs;
+ const struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
return (__raw_readl(&qmgr_regs->stat1[queue >> 3])
>> ((queue & 7) << 2)) & 0xF;
}
static inline int __qmgr_get_stat2(unsigned int queue)
{
- extern struct qmgr_regs __iomem *qmgr_regs;
+ const struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
BUG_ON(queue >= HALF_QUEUES);
return (__raw_readl(&qmgr_regs->stat2[queue >> 4])
>> ((queue & 0xF) << 1)) & 0x3;
@@ -145,7 +145,7 @@ static inline int qmgr_stat_empty(unsigned int queue)
*/
static inline int qmgr_stat_below_low_watermark(unsigned int queue)
{
- extern struct qmgr_regs __iomem *qmgr_regs;
+ const struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
if (queue >= HALF_QUEUES)
return (__raw_readl(&qmgr_regs->statne_h) >>
(queue - HALF_QUEUES)) & 0x01;
@@ -172,7 +172,7 @@ static inline int qmgr_stat_above_high_watermark(unsigned int queue)
*/
static inline int qmgr_stat_full(unsigned int queue)
{
- extern struct qmgr_regs __iomem *qmgr_regs;
+ const struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
if (queue >= HALF_QUEUES)
return (__raw_readl(&qmgr_regs->statf_h) >>
(queue - HALF_QUEUES)) & 0x01;
diff --git a/arch/arm/mach-ixp4xx/ixp4xx_npe.c b/arch/arm/mach-ixp4xx/ixp4xx_npe.c
index a17ed79207a4..d4eb09a62863 100644
--- a/arch/arm/mach-ixp4xx/ixp4xx_npe.c
+++ b/arch/arm/mach-ixp4xx/ixp4xx_npe.c
@@ -116,7 +116,11 @@
/* NPE mailbox_status value for reset */
#define RESET_MBOX_STAT 0x0000F0F0
-const char *npe_names[] = { "NPE-A", "NPE-B", "NPE-C" };
+#define NPE_A_FIRMWARE "NPE-A"
+#define NPE_B_FIRMWARE "NPE-B"
+#define NPE_C_FIRMWARE "NPE-C"
+
+const char *npe_names[] = { NPE_A_FIRMWARE, NPE_B_FIRMWARE, NPE_C_FIRMWARE };
#define print_npe(pri, npe, fmt, ...) \
printk(pri "%s: " fmt, npe_name(npe), ## __VA_ARGS__)
@@ -724,6 +728,9 @@ module_exit(npe_cleanup_module);
MODULE_AUTHOR("Krzysztof Halasa");
MODULE_LICENSE("GPL v2");
+MODULE_FIRMWARE(NPE_A_FIRMWARE);
+MODULE_FIRMWARE(NPE_B_FIRMWARE);
+MODULE_FIRMWARE(NPE_C_FIRMWARE);
EXPORT_SYMBOL(npe_names);
EXPORT_SYMBOL(npe_running);
diff --git a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
index 852f7c9f87d0..9d1b6b7c394c 100644
--- a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
+++ b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
@@ -14,7 +14,7 @@
#include <linux/module.h>
#include <mach/qmgr.h>
-struct qmgr_regs __iomem *qmgr_regs;
+static struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
static struct resource *mem_res;
static spinlock_t qmgr_lock;
static u32 used_sram_bitmap[4]; /* 128 16-dword pages */
@@ -293,12 +293,6 @@ static int qmgr_init(void)
if (mem_res == NULL)
return -EBUSY;
- qmgr_regs = ioremap(IXP4XX_QMGR_BASE_PHYS, IXP4XX_QMGR_REGION_SIZE);
- if (qmgr_regs == NULL) {
- err = -ENOMEM;
- goto error_map;
- }
-
/* reset qmgr registers */
for (i = 0; i < 4; i++) {
__raw_writel(0x33333333, &qmgr_regs->stat1[i]);
@@ -347,8 +341,6 @@ static int qmgr_init(void)
error_irq2:
free_irq(IRQ_IXP4XX_QM1, NULL);
error_irq:
- iounmap(qmgr_regs);
-error_map:
release_mem_region(IXP4XX_QMGR_BASE_PHYS, IXP4XX_QMGR_REGION_SIZE);
return err;
}
@@ -359,7 +351,6 @@ static void qmgr_remove(void)
free_irq(IRQ_IXP4XX_QM2, NULL);
synchronize_irq(IRQ_IXP4XX_QM1);
synchronize_irq(IRQ_IXP4XX_QM2);
- iounmap(qmgr_regs);
release_mem_region(IXP4XX_QMGR_BASE_PHYS, IXP4XX_QMGR_REGION_SIZE);
}
@@ -369,7 +360,6 @@ module_exit(qmgr_remove);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Krzysztof Halasa");
-EXPORT_SYMBOL(qmgr_regs);
EXPORT_SYMBOL(qmgr_set_irq);
EXPORT_SYMBOL(qmgr_enable_irq);
EXPORT_SYMBOL(qmgr_disable_irq);
diff --git a/arch/arm/mach-kirkwood/pcie.c b/arch/arm/mach-kirkwood/pcie.c
index ec544918b12c..74fc5a074fc4 100644
--- a/arch/arm/mach-kirkwood/pcie.c
+++ b/arch/arm/mach-kirkwood/pcie.c
@@ -207,14 +207,19 @@ static int __init kirkwood_pcie_setup(int nr, struct pci_sys_data *sys)
return 1;
}
+/*
+ * The root complex has a hardwired class of PCI_CLASS_MEMORY_OTHER, when it
+ * is operating as a root complex this needs to be switched to
+ * PCI_CLASS_BRIDGE_HOST or Linux will errantly try to process the BAR's on
+ * the device. Decoding setup is handled by the orion code.
+ */
static void __devinit rc_pci_fixup(struct pci_dev *dev)
{
- /*
- * Prevent enumeration of root complex.
- */
if (dev->bus->parent == NULL && dev->devfn == 0) {
int i;
+ dev->class &= 0xff;
+ dev->class |= PCI_CLASS_BRIDGE_HOST << 8;
for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
dev->resource[i].start = 0;
dev->resource[i].end = 0;
diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S
index 86b8b480634f..09c5233f4dfc 100644
--- a/arch/arm/mm/proc-v6.S
+++ b/arch/arm/mm/proc-v6.S
@@ -89,7 +89,7 @@ ENTRY(cpu_v6_dcache_clean_area)
mov pc, lr
/*
- * cpu_arm926_switch_mm(pgd_phys, tsk)
+ * cpu_v6_switch_mm(pgd_phys, tsk)
*
* Set the translation table base pointer to be pgd_phys
*
diff --git a/arch/arm/plat-s3c24xx/dma.c b/arch/arm/plat-s3c24xx/dma.c
index db98e7021f0d..0abd1c469887 100644
--- a/arch/arm/plat-s3c24xx/dma.c
+++ b/arch/arm/plat-s3c24xx/dma.c
@@ -473,12 +473,13 @@ int s3c2410_dma_enqueue(enum dma_ch channel, void *id,
pr_debug("dma%d: %s: buffer %p queued onto non-empty channel\n",
chan->number, __func__, buf);
- if (chan->end == NULL)
+ if (chan->end == NULL) {
pr_debug("dma%d: %s: %p not empty, and chan->end==NULL?\n",
chan->number, __func__, chan);
-
- chan->end->next = buf;
- chan->end = buf;
+ } else {
+ chan->end->next = buf;
+ chan->end = buf;
+ }
}
/* if necessary, update the next buffer field */