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USB: isp1362-hcd, fix double lock 

Stanse found that isp1362_sw_reset tries to take a isp1362_hcd->lock,
but it is already held in isp1362_hc_stop. Avoid that by introducing
__isp1362_sw_reset which doesn't take the lock and call it from
isp1362_hc_stop. isp1362_sw_reset is then as simple as lock --
__isp1362_sw_reset -- unlock.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Lothar Wassmann <LW@KARO-electronics.de>
Cc: Michael Hennerich <michael.hennerich@analog.com>
Cc: Bryan Wu <cooloney@kernel.org>
Cc: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jiri Slaby 2010-06-21 17:02:51 +02:00 committed by Greg Kroah-Hartman
parent 9a49a14da4
commit 1c81557782
1 changed files with 10 additions and 5 deletions
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15
drivers/usb/host/isp1362-hcd.c
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@ -2224,12 +2224,9 @@ static void remove_debug_file(struct isp1362_hcd *isp1362_hcd)
/*-------------------------------------------------------------------------*/
static void isp1362_sw_reset(struct isp1362_hcd *isp1362_hcd)
static void __isp1362_sw_reset(struct isp1362_hcd *isp1362_hcd)
{
int tmp = 20;
unsigned long flags;
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_write_reg16(isp1362_hcd, HCSWRES, HCSWRES_MAGIC);
isp1362_write_reg32(isp1362_hcd, HCCMDSTAT, OHCI_HCR);
@ -2240,6 +2237,14 @@ static void isp1362_sw_reset(struct isp1362_hcd *isp1362_hcd)
}
if (!tmp)
pr_err("Software reset timeout\n");
}
static void isp1362_sw_reset(struct isp1362_hcd *isp1362_hcd)
{
unsigned long flags;
spin_lock_irqsave(&isp1362_hcd->lock, flags);
__isp1362_sw_reset(isp1362_hcd);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
}
@ -2418,7 +2423,7 @@ static void isp1362_hc_stop(struct usb_hcd *hcd)
if (isp1362_hcd->board && isp1362_hcd->board->reset)
isp1362_hcd->board->reset(hcd->self.controller, 1);
else
isp1362_sw_reset(isp1362_hcd);
__isp1362_sw_reset(isp1362_hcd);
if (isp1362_hcd->board && isp1362_hcd->board->clock)
isp1362_hcd->board->clock(hcd->self.controller, 0);