The patch titled
rapidio: fix hang on RapidIO doorbell queue full condition
has been added to the -mm tree. Its filename is
rapidio-fix-hang-on-rapidio-doorbell-queue-full-condition.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: rapidio: fix hang on RapidIO doorbell queue full condition
From: Thomas Taranowski <[email protected]>
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 <[email protected]>
Cc: Alexandre Bounine <[email protected]>
Cc: Kumar Gala <[email protected]>
Cc: Matt Porter <[email protected]>
Cc: Li Yang <[email protected]>
Cc: Thomas Moll <[email protected]>
Cc: Micha Nelissen <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Grant Likely <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
arch/powerpc/sysdev/fsl_rio.c | 1 -
1 file changed, 1 deletion(-)
diff -puN
arch/powerpc/sysdev/fsl_rio.c~rapidio-fix-hang-on-rapidio-doorbell-queue-full-condition
arch/powerpc/sysdev/fsl_rio.c
---
a/arch/powerpc/sysdev/fsl_rio.c~rapidio-fix-hang-on-rapidio-doorbell-queue-full-condition
+++ a/arch/powerpc/sysdev/fsl_rio.c
@@ -973,7 +973,6 @@ fsl_rio_dbell_handler(int irq, void *dev
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 */
_
Patches currently in -mm which might be from [email protected] are
rapidio-fix-hang-on-rapidio-doorbell-queue-full-condition.patch
_______________________________________________
stable mailing list
[email protected]
http://linux.kernel.org/mailman/listinfo/stable
