Messages in this thread Patch in this message | | | Date | Sun, 20 Dec 2009 10:52:48 +0100 | From | Dominik Brodowski <> | Subject | Re: 2.6.33-rc0 regression: 256MB CF card no longer recognized in PCMCIA slot |
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Hey,
On Sat, Dec 19, 2009 at 05:34:15PM -0500, Jeff Garzik wrote: > On 12/19/2009 04:55 PM, Pavel Machek wrote: > >Hi! > > > >Subject pretty much says it all... I do get some messages on the > >console, I'll try to gather them. > > Which driver(s) no longer see it? Do you think it's the PCMCIA > subsystem, IDE, libata or other?
My suspicion is that it might be kernel/resource.c -- Pavel, does this patch fix the issue you're seeing?
Best, Dominik
From: Dominik Brodowski <linux@dominikbrodowski.net> Date: Sun, 20 Dec 2009 10:04:56 +0100 Subject: [PATCH] resources: fix call to alignf() in allocate_resource()
The second parameter to alignf() in allocate_resource() must reflect what new resource is attempted to be allocated, else functions like pcibios_align_resource() (at least on x86) or pcmcia_align() can't work correctly.
Commit 1e5ad9679016275d422e36b12a98b0927d76f556 broke this by setting the "new" resource until we're about to return success. To keep the resource untouched when allocate_resource() fails, a "tmp" resource is introduced.
CC: Linus Torvalds <torvalds@linux-foundation.org> CC: Yinghai Lu <yhlu.kernel@gmail.com> CC: Bjorn Helgaas <bjorn.helgaas@hp.com> CC: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
diff --git a/kernel/resource.c b/kernel/resource.c index dc15686..af96c1e 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -308,37 +308,37 @@ static int find_resource(struct resource *root, struct resource *new, void *alignf_data) { struct resource *this = root->child; - resource_size_t start, end; + struct resource tmp = *new; - start = root->start; + tmp.start = root->start; /* * Skip past an allocated resource that starts at 0, since the assignment - * of this->start - 1 to new->end below would cause an underflow. + * of this->start - 1 to tmp->end below would cause an underflow. */ if (this && this->start == 0) { - start = this->end + 1; + tmp.start = this->end + 1; this = this->sibling; } for(;;) { if (this) - end = this->start - 1; + tmp.end = this->start - 1; else - end = root->end; - if (start < min) - start = min; - if (end > max) - end = max; - start = ALIGN(start, align); + tmp.end = root->end; + if (tmp.start < min) + tmp.start = min; + if (tmp.end > max) + tmp.end = max; + tmp.start = ALIGN(tmp.start, align); if (alignf) - alignf(alignf_data, new, size, align); - if (start < end && end - start >= size - 1) { - new->start = start; - new->end = start + size - 1; + alignf(alignf_data, &tmp, size, align); + if (tmp.start < tmp.end && tmp.end - tmp.start >= size - 1) { + new->start = tmp.start; + new->end = tmp.start + size - 1; return 0; } if (!this) break; - start = this->end + 1; + tmp.start = this->end + 1; this = this->sibling; } return -EBUSY;
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