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USB: EHCI: Refactor "if (handshake()) state = HC_STATE_HALT" 

Refactor the EHCI "if (handshake()) state = HC_STATE_HALT" idiom,
which appears 4 times, by replacing it with calls to a new function
called handshake_on_error_set_halt().  Saves a few bytes too.

Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Karsten Wiese 2008-02-16 13:44:42 -08:00 committed by Greg Kroah-Hartman
parent 96f9bc373c
commit c765d4cad9
2 changed files with 20 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/usb/host/ehci-hcd.c
View File

@ -145,6 +145,16 @@ static int handshake (struct ehci_hcd *ehci, void __iomem *ptr,
return -ETIMEDOUT;
}
static int handshake_on_error_set_halt(struct ehci_hcd *ehci, void __iomem *ptr,
u32 mask, u32 done, int usec)
{
int error = handshake(ehci, ptr, mask, done, usec);
if (error)
ehci_to_hcd(ehci)->state = HC_STATE_HALT;
return error;
}
/* force HC to halt state from unknown (EHCI spec section 2.3) */
static int ehci_halt (struct ehci_hcd *ehci)
{
@ -217,11 +227,9 @@ static void ehci_quiesce (struct ehci_hcd *ehci)
/* wait for any schedule enables/disables to take effect */
temp = ehci_readl(ehci, &ehci->regs->command) << 10;
temp &= STS_ASS | STS_PSS;
if (handshake (ehci, &ehci->regs->status, STS_ASS | STS_PSS,
temp, 16 * 125) != 0) {
ehci_to_hcd(ehci)->state = HC_STATE_HALT;
if (handshake_on_error_set_halt(ehci, &ehci->regs->status,
STS_ASS | STS_PSS, temp, 16 * 125))
return;
}
/* then disable anything that's still active */
temp = ehci_readl(ehci, &ehci->regs->command);
@ -229,11 +237,8 @@ static void ehci_quiesce (struct ehci_hcd *ehci)
ehci_writel(ehci, temp, &ehci->regs->command);
/* hardware can take 16 microframes to turn off ... */
if (handshake (ehci, &ehci->regs->status, STS_ASS | STS_PSS,
0, 16 * 125) != 0) {
ehci_to_hcd(ehci)->state = HC_STATE_HALT;
return;
}
handshake_on_error_set_halt(ehci, &ehci->regs->status,
STS_ASS | STS_PSS, 0, 16 * 125);
}
/*-------------------------------------------------------------------------*/

14
drivers/usb/host/ehci-sched.c
View File

@ -440,11 +440,10 @@ static int enable_periodic (struct ehci_hcd *ehci)
/* did clearing PSE did take effect yet?
* takes effect only at frame boundaries...
*/
status = handshake(ehci, &ehci->regs->status, STS_PSS, 0, 9 * 125);
if (status != 0) {
ehci_to_hcd(ehci)->state = HC_STATE_HALT;
status = handshake_on_error_set_halt(ehci, &ehci->regs->status,
STS_PSS, 0, 9 * 125);
if (status)
return status;
}
cmd = ehci_readl(ehci, &ehci->regs->command) | CMD_PSE;
ehci_writel(ehci, cmd, &ehci->regs->command);
@ -465,11 +464,10 @@ static int disable_periodic (struct ehci_hcd *ehci)
/* did setting PSE not take effect yet?
* takes effect only at frame boundaries...
*/
status = handshake(ehci, &ehci->regs->status, STS_PSS, STS_PSS, 9 * 125);
if (status != 0) {
ehci_to_hcd(ehci)->state = HC_STATE_HALT;
status = handshake_on_error_set_halt(ehci, &ehci->regs->status,
STS_PSS, STS_PSS, 9 * 125);
if (status)
return status;
}
cmd = ehci_readl(ehci, &ehci->regs->command) & ~CMD_PSE;
ehci_writel(ehci, cmd, &ehci->regs->command);