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authorHeiko Carstens <heiko.carstens@de.ibm.com>2017-02-02 12:33:03 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2017-02-08 14:13:21 +0100
commitf694bb3a36a8113addd31817e4b5aca42326353d (patch)
treeea99bbb43adba384a822788b6bf0067c9a6b7405 /drivers/s390
parent02407baaebdef86571e4e939ddbd3b32d9b5d389 (diff)
downloadlinux-f694bb3a36a8113addd31817e4b5aca42326353d.tar.bz2
s390/sclp: get rid of common response code handling
Get rid of common response code handling. Each command requires its own response code handling anyway. Also the retry in case of -EBUSY does not work and can be simply removed. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/char/sclp.h1
-rw-r--r--drivers/s390/char/sclp_early.c27
-rw-r--r--drivers/s390/char/sclp_early_core.c22
3 files changed, 17 insertions, 33 deletions
diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h
index 78d5f542d979..53b5d1b9761a 100644
--- a/drivers/s390/char/sclp.h
+++ b/drivers/s390/char/sclp.h
@@ -224,7 +224,6 @@ extern unsigned long sclp_console_full;
extern char sclp_early_sccb[PAGE_SIZE];
void sclp_early_wait_irq(void);
-int sclp_early_cmd_sync(sclp_cmdw_t cmd, void *sccb);
int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb);
int sclp_early_set_event_mask(struct init_sccb *sccb,
diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
index 2f9e50379e64..519ec1787117 100644
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -62,20 +62,16 @@ EXPORT_SYMBOL(sclp);
static int __init sclp_early_read_info(struct read_info_sccb *sccb)
{
- int rc, i;
+ int i;
sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED,
SCLP_CMDW_READ_SCP_INFO};
for (i = 0; i < ARRAY_SIZE(commands); i++) {
- do {
- memset(sccb, 0, sizeof(*sccb));
- sccb->header.length = sizeof(*sccb);
- sccb->header.function_code = 0x80;
- sccb->header.control_mask[2] = 0x80;
- rc = sclp_early_cmd_sync(commands[i], sccb);
- } while (rc == -EBUSY);
-
- if (rc)
+ memset(sccb, 0, sizeof(*sccb));
+ sccb->header.length = sizeof(*sccb);
+ sccb->header.function_code = 0x80;
+ sccb->header.control_mask[2] = 0x80;
+ if (sclp_early_cmd(commands[i], sccb))
break;
if (sccb->header.response_code == 0x10)
return 0;
@@ -167,16 +163,11 @@ static int sclp_early_core_info_valid __initdata;
static void __init sclp_early_init_core_info(struct read_cpu_info_sccb *sccb)
{
- int rc;
-
if (!SCLP_HAS_CPU_INFO)
return;
memset(sccb, 0, sizeof(*sccb));
sccb->header.length = sizeof(*sccb);
- do {
- rc = sclp_early_cmd_sync(SCLP_CMDW_READ_CPU_INFO, sccb);
- } while (rc == -EBUSY);
- if (rc)
+ if (sclp_early_cmd(SCLP_CMDW_READ_CPU_INFO, sccb))
return;
if (sccb->header.response_code != 0x0010)
return;
@@ -204,6 +195,8 @@ static long __init sclp_early_hsa_size_init(struct sdias_sccb *sccb)
sccb->evbuf.dbs = 1;
if (sclp_early_cmd(SCLP_CMDW_WRITE_EVENT_DATA, sccb))
return -EIO;
+ if (sccb->hdr.response_code != 0x20)
+ return -EIO;
if (sccb->evbuf.blk_cnt == 0)
return 0;
return (sccb->evbuf.blk_cnt - 1) * PAGE_SIZE;
@@ -215,6 +208,8 @@ static long __init sclp_early_hsa_copy_wait(struct sdias_sccb *sccb)
sccb->hdr.length = PAGE_SIZE;
if (sclp_early_cmd(SCLP_CMDW_READ_EVENT_DATA, sccb))
return -EIO;
+ if ((sccb->hdr.response_code != 0x20) && (sccb->hdr.response_code != 0x220))
+ return -EIO;
if (sccb->evbuf.blk_cnt == 0)
return 0;
return (sccb->evbuf.blk_cnt - 1) * PAGE_SIZE;
diff --git a/drivers/s390/char/sclp_early_core.c b/drivers/s390/char/sclp_early_core.c
index cc3ad8c69a7a..5029cc87e80f 100644
--- a/drivers/s390/char/sclp_early_core.c
+++ b/drivers/s390/char/sclp_early_core.c
@@ -50,7 +50,7 @@ void sclp_early_wait_irq(void)
__ctl_load(cr0.val, 0, 0);
}
-int sclp_early_cmd_sync(sclp_cmdw_t cmd, void *sccb)
+int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb)
{
unsigned long flags;
int rc;
@@ -65,20 +65,6 @@ out:
return rc;
}
-int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb)
-{
- int rc;
-
- do {
- rc = sclp_early_cmd_sync(cmd, sccb);
- } while (rc == -EBUSY);
- if (rc)
- return -EIO;
- if (((struct sccb_header *) sccb)->response_code != 0x0020)
- return -EIO;
- return 0;
-}
-
struct write_sccb {
struct sccb_header header;
struct msg_buf msg;
@@ -163,7 +149,11 @@ int sclp_early_set_event_mask(struct init_sccb *sccb,
sccb->mask_length = sizeof(sccb_mask_t);
sccb->receive_mask = receive_mask;
sccb->send_mask = send_mask;
- return sclp_early_cmd(SCLP_CMDW_WRITE_EVENT_MASK, sccb);
+ if (sclp_early_cmd(SCLP_CMDW_WRITE_EVENT_MASK, sccb))
+ return -EIO;
+ if (sccb->header.response_code != 0x20)
+ return -EIO;
+ return 0;
}
unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb)