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authorBrian King <brking@linux.vnet.ibm.com>2007-04-26 16:00:06 -0500
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2007-05-06 09:33:17 -0500
commit970ea2941199f9c5f3b4faffd68e7e9a4505de8e (patch)
treec4080dfaef7cda2cc06b00d05ae524aab24c72e3 /drivers/scsi/ipr.c
parentd7a54e30d324b6f3b29a6cf2ff24c95b135013f5 (diff)
[SCSI] ipr: Prevent overlapped adapter resets
This patch fixes some scenarios where an ipr adapter could get reset overlapped, which could cause very long timeouts to occur, or PCI bus errors. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/ipr.c')
-rw-r--r--drivers/scsi/ipr.c24
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 2c7b77e833f9..f7af86f73d6b 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -2635,8 +2635,13 @@ static ssize_t ipr_store_diagnostics(struct class_device *class_dev,
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
+ while(ioa_cfg->in_reset_reload) {
+ spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
+ wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
+ spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
+ }
+
ioa_cfg->errors_logged = 0;
ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
@@ -2958,6 +2963,11 @@ static int ipr_update_ioa_ucode(struct ipr_ioa_cfg *ioa_cfg,
unsigned long lock_flags;
spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
+ while(ioa_cfg->in_reset_reload) {
+ spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
+ wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
+ spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
+ }
if (ioa_cfg->ucode_sglist) {
spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
@@ -7428,6 +7438,12 @@ static void __ipr_remove(struct pci_dev *pdev)
ENTER;
spin_lock_irqsave(ioa_cfg->host->host_lock, host_lock_flags);
+ while(ioa_cfg->in_reset_reload) {
+ spin_unlock_irqrestore(ioa_cfg->host->host_lock, host_lock_flags);
+ wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
+ spin_lock_irqsave(ioa_cfg->host->host_lock, host_lock_flags);
+ }
+
ipr_initiate_ioa_bringdown(ioa_cfg, IPR_SHUTDOWN_NORMAL);
spin_unlock_irqrestore(ioa_cfg->host->host_lock, host_lock_flags);
@@ -7551,6 +7567,12 @@ static void ipr_shutdown(struct pci_dev *pdev)
unsigned long lock_flags = 0;
spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
+ while(ioa_cfg->in_reset_reload) {
+ spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
+ wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
+ spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
+ }
+
ipr_initiate_ioa_bringdown(ioa_cfg, IPR_SHUTDOWN_NORMAL);
spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);