Re: [PATCH] EHCI: fix DMA deallocation bug

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On Fri, Jan 07, 2011 at 12:51:19AM +0300, Sergei Shtylyov wrote:
> Hello.
> 
> On 06-01-2011 18:17, Alan Stern wrote:
> 
> >This patch (as1440) fixes a bug in ehci-hcd.  ehci->periodic_size is
> >used to compute the size in a dma_alloc_coherent() call, but then it
> >gets changed later on.  As a result, the corresponding call to
> >dma_free_coherent() passes a different size from the original
> >allocation.  Fix the problem by adjusting ehci->periodic_size before
> >carrying out any of the memory allocations.
> 
> >Signed-off-by: Alan Stern<stern@xxxxxxxxxxxxxxxxxxx>
> >Tested-by: Larry Finger<Larry.Finger@xxxxxxxxxxxx>
> >CC: David Brownell<david-b@xxxxxxxxxxx>
> >CC:<stable@xxxxxxxxxx>
> 
> [...]
> 
> >Index: usb-2.6/drivers/usb/host/ehci-hcd.c
> >===================================================================
> >--- usb-2.6.orig/drivers/usb/host/ehci-hcd.c
> >+++ usb-2.6/drivers/usb/host/ehci-hcd.c
> [...]
> >@@ -571,11 +573,20 @@ static int ehci_init(struct usb_hcd *hcd
> >  	ehci->periodic_size = DEFAULT_I_TDPS;
> >  	INIT_LIST_HEAD(&ehci->cached_itd_list);
> >  	INIT_LIST_HEAD(&ehci->cached_sitd_list);
> >+
> >+	if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
> >+		/* periodic schedule size can be smaller than default */
> >+		switch (EHCI_TUNE_FLS) {
> >+		case 0: ehci->periodic_size = 1024; break;
> >+		case 1: ehci->periodic_size = 512; break;
> >+		case 2: ehci->periodic_size = 256; break;
> 
>    I undertand that you're only moving the code but this should
> cause checkpatch.pl to complain because it thinks that trailing
> statements should be on the next line after the *case*...

Then checkpatch is stupid.

Seriously, not all patches _HAVE_ to pass that script, especially ones
from developers that are trusted.

Just stop the nit-picking, it really isn't helpful to anyone, and wastes
everyone's time.

thanks,

greg k-h
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