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| author | Brian King <brking@linux.vnet.ibm.com> | 2007-04-26 16:00:06 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2007-05-06 09:33:17 -0500 |
| commit | 970ea2941199f9c5f3b4faffd68e7e9a4505de8e (patch) | |
| tree | c4080dfaef7cda2cc06b00d05ae524aab24c72e3 /drivers/scsi/ipr.c | |
| parent | d7a54e30d324b6f3b29a6cf2ff24c95b135013f5 (diff) | |
| download | linux-970ea2941199f9c5f3b4faffd68e7e9a4505de8e.tar.gz linux-970ea2941199f9c5f3b4faffd68e7e9a4505de8e.tar.bz2 linux-970ea2941199f9c5f3b4faffd68e7e9a4505de8e.zip | |
[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.c | 24 |
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); |