diff options
| author | Thomas Taranowski <tom@baringforge.com> | 2011-01-12 17:00:44 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-02-17 15:37:01 -0800 |
| commit | 6399e7b53fe9eb4289e6dfc987e09f393da8aba1 (patch) | |
| tree | b6ac4365ca5fd93b222e6dae020cb2bbf4de44c5 /arch | |
| parent | 9980ac8114583f0e40492bbe36e7c82a410bbec9 (diff) | |
rapidio: fix hang on RapidIO doorbell queue full condition
commit 12a4dc43911785f51a596f771ae0701b18d436f1 upstream.
In fsl_rio_dbell_handler() the code currently simply acknowledges the QFI
queue full interrupt, but does nothing to resolve the queue full
condition. Instead, it jumps to the end of the isr. When a queue full
condition occurs, the isr is then re-entered immediately and continually,
forever.
The fix is to just fall through and read out current doorbell entries.
Signed-off-by: Thomas Taranowski <tom@baringforge.com>
Cc: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Micha Nelissen <micha@neli.hopto.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/sysdev/fsl_rio.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c index 757a83fe5e59..fa79af5d537e 100644 --- a/arch/powerpc/sysdev/fsl_rio.c +++ b/arch/powerpc/sysdev/fsl_rio.c @@ -832,7 +832,6 @@ fsl_rio_dbell_handler(int irq, void *dev_instance) if (dsr & DOORBELL_DSR_QFI) { pr_info("RIO: doorbell queue full\n"); out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_QFI); - goto out; } /* XXX Need to check/dispatch until queue empty */ |