Messages in this thread | | | From | Xiangliang Yu <> | Date | Thu, 8 Nov 2012 23:30:03 -0800 | Subject | RE: [PATCH 2/3] [SCSI] mvsas: fix shift in mvs_94xx_free_reg_set() |
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> On 11/6/12 7:06 AM, James Bottomley wrote: > > > > Why is this necessary? As I read the reg set assignment code, it finds > > a free bit in the 64 bit register and uses that ... which can never be > > greater than 64 so there's no need for the check. > > This patch just tries to be more defensive for bit(reg_set) with a > broken reg_set value. I agree with you that it's not that necessary.
Agree with James, and just need to do NOT operation one time
> > > The other two look OK (probably redone as a single patch with a stable > > tag), but I'd like the input of the mvs people since it seems with the > > current code, we only use 32 bit regsets and probably hang if we go over > > that. The bug fix is either to enable the full 64 if it works, or > > possibly cap at 32 ... what works with all released devices? > > Thanks for reviewing. Yeah we'd better to wait for the input from > the mvs people.
About patch 3, I check the ffz code and found it will check ~0 conditions.
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