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authorAlex Dubov <oakad@yahoo.com>2007-04-12 16:59:19 +1000
committerPierre Ossman <drzeus@drzeus.cx>2007-05-01 13:04:13 +0200
commit88de1b2fed2bbe9eb1b7310195be84cf143efb4f (patch)
tree4f52fe092254b8992a19797860edc8889c08a1f5 /drivers/misc/tifm_7xx1.c
parent2428a8fe2261e901e058d9ea8b6ed7e1b4268b79 (diff)
downloadlinux-88de1b2fed2bbe9eb1b7310195be84cf143efb4f.tar.bz2
tifm_7xx1: fix adapter resume function
Fixes to the adapter resume function to correctly handle all possible cases: 1. Card is removed during suspend 2. Card is inserted during suspend into previously empty socket 3. Card is replaced during suspend by same or different media type card. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/misc/tifm_7xx1.c')
-rw-r--r--drivers/misc/tifm_7xx1.c58
1 files changed, 31 insertions, 27 deletions
diff --git a/drivers/misc/tifm_7xx1.c b/drivers/misc/tifm_7xx1.c
index 356386904a5d..eafa5575f312 100644
--- a/drivers/misc/tifm_7xx1.c
+++ b/drivers/misc/tifm_7xx1.c
@@ -220,7 +220,8 @@ static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
static int tifm_7xx1_resume(struct pci_dev *dev)
{
struct tifm_adapter *fm = pci_get_drvdata(dev);
- int cnt, rc;
+ int rc;
+ unsigned int good_sockets = 0, bad_sockets = 0;
unsigned long flags;
unsigned char new_ids[fm->num_sockets];
DECLARE_COMPLETION_ONSTACK(finish_resume);
@@ -234,46 +235,49 @@ static int tifm_7xx1_resume(struct pci_dev *dev)
dev_dbg(&dev->dev, "resuming host\n");
- for (cnt = 0; cnt < fm->num_sockets; cnt++)
- new_ids[cnt] = tifm_7xx1_toggle_sock_power(
- tifm_7xx1_sock_addr(fm->addr, cnt));
+ for (rc = 0; rc < fm->num_sockets; rc++)
+ new_ids[rc] = tifm_7xx1_toggle_sock_power(
+ tifm_7xx1_sock_addr(fm->addr, rc));
spin_lock_irqsave(&fm->lock, flags);
- fm->socket_change_set = 0;
- for (cnt = 0; cnt < fm->num_sockets; cnt++) {
- if (fm->sockets[cnt]) {
- if (fm->sockets[cnt]->type == new_ids[cnt])
- fm->socket_change_set |= 1 << cnt;
-
- fm->sockets[cnt]->type = new_ids[cnt];
+ for (rc = 0; rc < fm->num_sockets; rc++) {
+ if (fm->sockets[rc]) {
+ if (fm->sockets[rc]->type == new_ids[rc])
+ good_sockets |= 1 << rc;
+ else
+ bad_sockets |= 1 << rc;
}
}
writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
fm->addr + FM_SET_INTERRUPT_ENABLE);
- if (!fm->socket_change_set) {
- spin_unlock_irqrestore(&fm->lock, flags);
- return 0;
- } else {
- fm->socket_change_set = 0;
+ dev_dbg(&dev->dev, "change sets on resume: good %x, bad %x\n",
+ good_sockets, bad_sockets);
+
+ fm->socket_change_set = 0;
+ if (good_sockets) {
fm->finish_me = &finish_resume;
spin_unlock_irqrestore(&fm->lock, flags);
+ rc = wait_for_completion_timeout(&finish_resume, HZ);
+ dev_dbg(&dev->dev, "wait returned %d\n", rc);
+ writel(TIFM_IRQ_FIFOMASK(good_sockets)
+ | TIFM_IRQ_CARDMASK(good_sockets),
+ fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+ writel(TIFM_IRQ_FIFOMASK(good_sockets)
+ | TIFM_IRQ_CARDMASK(good_sockets),
+ fm->addr + FM_SET_INTERRUPT_ENABLE);
+ spin_lock_irqsave(&fm->lock, flags);
+ fm->finish_me = NULL;
+ fm->socket_change_set ^= good_sockets & fm->socket_change_set;
}
- wait_for_completion_timeout(&finish_resume, HZ);
+ fm->socket_change_set |= bad_sockets;
+ if (fm->socket_change_set)
+ tifm_queue_work(&fm->media_switcher);
- spin_lock_irqsave(&fm->lock, flags);
- fm->finish_me = NULL;
- writel(TIFM_IRQ_FIFOMASK(fm->socket_change_set)
- | TIFM_IRQ_CARDMASK(fm->socket_change_set),
- fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
- writel(TIFM_IRQ_FIFOMASK(fm->socket_change_set)
- | TIFM_IRQ_CARDMASK(fm->socket_change_set),
- fm->addr + FM_SET_INTERRUPT_ENABLE);
+ spin_unlock_irqrestore(&fm->lock, flags);
writel(TIFM_IRQ_ENABLE,
fm->addr + FM_SET_INTERRUPT_ENABLE);
- fm->socket_change_set = 0;
- spin_unlock_irqrestore(&fm->lock, flags);
return 0;
}