[SCSI] megaraid_sas: intercept cmd timeout and throttle io

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eh_timed_out call back (megasas_reset_timer) is used to throttle io
to the adapter when it is called the first time for a scmd.
The MEGASAS_FW_BUSY flag is set and can_queue reduced to 16.
The can_queue is restored from completion routine in following
two conditions : 5 seconds has elapsed and
the # of outstanding cmds in FW is < 17.

Signed-off-by: Sumant Patro <sumant.patro@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

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Sumant Patro 2007-05-17 05:47:51 -07:00 • committed by James Bottomley

parent 3d9780b976

commit 05e9ebbefb

2 changed files with 69 additions and 12 deletions

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67

drivers/scsi/megaraid/megaraid_sas.c

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14

drivers/scsi/megaraid/megaraid_sas.h

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