Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=888fda47051716765175d0008450126c837adb32
Commit: 888fda47051716765175d0008450126c837adb32
Parent: 65e51098d9094c7e840b6d6291867b95538d9442
Author: Alan Stern <[EMAIL PROTECTED]>
AuthorDate: Fri Aug 24 15:41:18 2007 -0400
Committer: Greg Kroah-Hartman <[EMAIL PROTECTED]>
CommitDate: Fri Oct 12 14:55:23 2007 -0700
USB: reorganize urb->status use in r8a66597-hcd
This patch (as977) reorganizes the way r8a66597-hcd sets urb->status. It
now keeps the information in a local variable until the last moment.
Parts of this patch were written by Yoshihiro Shimoda.
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
CC: Yoshihiro Shimoda <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
drivers/usb/host/r8a66597-hcd.c | 61 +++++++++++++++++++--------------------
1 files changed, 30 insertions(+), 31 deletions(-)
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index 98b9e05..fea6036 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -1109,7 +1109,7 @@ static void set_td_timer(struct r8a66597 *r8a66597,
struct r8a66597_td *td)
/* this function must be called with interrupt disabled */
static void finish_request(struct r8a66597 *r8a66597, struct r8a66597_td *td,
- u16 pipenum, struct urb *urb)
+ u16 pipenum, struct urb *urb, int status)
__releases(r8a66597->lock) __acquires(r8a66597->lock)
{
int restart = 0;
@@ -1118,7 +1118,7 @@ __releases(r8a66597->lock) __acquires(r8a66597->lock)
r8a66597->timeout_map &= ~(1 << pipenum);
if (likely(td)) {
- if (td->set_address && (urb->status != 0 || urb->unlinked))
+ if (td->set_address && (status != 0 || urb->unlinked))
r8a66597->address_map &= ~(1 << urb->setup_packet[2]);
pipe_toggle_save(r8a66597, td->pipe, urb);
@@ -1135,6 +1135,7 @@ __releases(r8a66597->lock) __acquires(r8a66597->lock)
usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597), urb);
+ urb->status = status;
spin_unlock(&r8a66597->lock);
usb_hcd_giveback_urb(hcd, urb);
spin_lock(&r8a66597->lock);
@@ -1167,11 +1168,10 @@ static void packet_read(struct r8a66597 *r8a66597, u16
pipenum)
fifo_change_from_pipe(r8a66597, td->pipe);
tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
if (unlikely((tmp & FRDY) == 0)) {
- urb->status = -EPIPE;
pipe_stop(r8a66597, td->pipe);
pipe_irq_disable(r8a66597, pipenum);
err("in fifo not ready (%d)", pipenum);
- finish_request(r8a66597, td, pipenum, td->urb);
+ finish_request(r8a66597, td, pipenum, td->urb, -EPIPE);
return;
}
@@ -1224,10 +1224,8 @@ static void packet_read(struct r8a66597 *r8a66597, u16
pipenum)
buf, size);
}
- if (finish && pipenum != 0) {
- td->urb->status = status;
- finish_request(r8a66597, td, pipenum, urb);
- }
+ if (finish && pipenum != 0)
+ finish_request(r8a66597, td, pipenum, urb, status);
}
static void packet_write(struct r8a66597 *r8a66597, u16 pipenum)
@@ -1245,11 +1243,10 @@ static void packet_write(struct r8a66597 *r8a66597, u16
pipenum)
fifo_change_from_pipe(r8a66597, td->pipe);
tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
if (unlikely((tmp & FRDY) == 0)) {
- urb->status = -EPIPE;
pipe_stop(r8a66597, td->pipe);
pipe_irq_disable(r8a66597, pipenum);
err("out write fifo not ready. (%d)", pipenum);
- finish_request(r8a66597, td, pipenum, td->urb);
+ finish_request(r8a66597, td, pipenum, urb, -EPIPE);
return;
}
@@ -1294,7 +1291,7 @@ static void packet_write(struct r8a66597 *r8a66597, u16
pipenum)
}
-static void check_next_phase(struct r8a66597 *r8a66597)
+static void check_next_phase(struct r8a66597 *r8a66597, int status)
{
struct r8a66597_td *td = r8a66597_get_td(r8a66597, 0);
struct urb *urb;
@@ -1320,28 +1317,28 @@ static void check_next_phase(struct r8a66597 *r8a66597)
break;
case USB_PID_ACK:
finish = 1;
- urb->status = 0;
break;
}
- if (finish || urb->unlinked)
- finish_request(r8a66597, td, 0, urb);
+ if (finish || status != 0 || urb->unlinked)
+ finish_request(r8a66597, td, 0, urb, status);
else
start_transfer(r8a66597, td);
}
-static void set_urb_error(struct r8a66597 *r8a66597, u16 pipenum)
+static int get_urb_error(struct r8a66597 *r8a66597, u16 pipenum)
{
struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
- if (td && td->urb) {
+ if (td) {
u16 pid = r8a66597_read(r8a66597, td->pipe->pipectr) & PID;
if (pid == PID_NAK)
- td->urb->status = -ECONNRESET;
+ return -ECONNRESET;
else
- td->urb->status = -EPIPE;
+ return -EPIPE;
}
+ return 0;
}
static void irq_pipe_ready(struct r8a66597 *r8a66597)
@@ -1360,7 +1357,7 @@ static void irq_pipe_ready(struct r8a66597 *r8a66597)
packet_read(r8a66597, 0);
else
pipe_irq_disable(r8a66597, 0);
- check_next_phase(r8a66597);
+ check_next_phase(r8a66597, 0);
}
for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
@@ -1394,7 +1391,7 @@ static void irq_pipe_empty(struct r8a66597 *r8a66597)
td = r8a66597_get_td(r8a66597, 0);
if (td && td->type != USB_PID_OUT)
disable_irq_empty(r8a66597, 0);
- check_next_phase(r8a66597);
+ check_next_phase(r8a66597, 0);
}
for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
@@ -1409,8 +1406,8 @@ static void irq_pipe_empty(struct r8a66597 *r8a66597)
if ((tmp & INBUFM) == 0) {
disable_irq_empty(r8a66597, pipenum);
pipe_irq_disable(r8a66597, pipenum);
- td->urb->status = 0;
- finish_request(r8a66597, td, pipenum, td->urb);
+ finish_request(r8a66597, td, pipenum, td->urb,
+ 0);
}
}
}
@@ -1421,15 +1418,16 @@ static void irq_pipe_nrdy(struct r8a66597 *r8a66597)
u16 check;
u16 pipenum;
u16 mask;
+ int status;
mask = r8a66597_read(r8a66597, NRDYSTS)
& r8a66597_read(r8a66597, NRDYENB);
r8a66597_write(r8a66597, ~mask, NRDYSTS);
if (mask & NRDY0) {
cfifo_change(r8a66597, 0);
- set_urb_error(r8a66597, 0);
+ status = get_urb_error(r8a66597, 0);
pipe_irq_disable(r8a66597, 0);
- check_next_phase(r8a66597);
+ check_next_phase(r8a66597, status);
}
for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
@@ -1440,10 +1438,10 @@ static void irq_pipe_nrdy(struct r8a66597 *r8a66597)
if (unlikely(!td))
continue;
- set_urb_error(r8a66597, pipenum);
+ status = get_urb_error(r8a66597, pipenum);
pipe_irq_disable(r8a66597, pipenum);
pipe_stop(r8a66597, td->pipe);
- finish_request(r8a66597, td, pipenum, td->urb);
+ finish_request(r8a66597, td, pipenum, td->urb, status);
}
}
}
@@ -1463,6 +1461,7 @@ static irqreturn_t r8a66597_irq(struct usb_hcd *hcd)
u16 intsts0, intsts1, intsts2;
u16 intenb0, intenb1, intenb2;
u16 mask0, mask1, mask2;
+ int status;
spin_lock(&r8a66597->lock);
@@ -1506,12 +1505,12 @@ static irqreturn_t r8a66597_irq(struct usb_hcd *hcd)
}
if (mask1 & SIGN) {
r8a66597_write(r8a66597, ~SIGN, INTSTS1);
- set_urb_error(r8a66597, 0);
- check_next_phase(r8a66597);
+ status = get_urb_error(r8a66597, 0);
+ check_next_phase(r8a66597, status);
}
if (mask1 & SACK) {
r8a66597_write(r8a66597, ~SACK, INTSTS1);
- check_next_phase(r8a66597);
+ check_next_phase(r8a66597, 0);
}
}
if (mask0) {
@@ -1790,7 +1789,7 @@ static int r8a66597_urb_dequeue(struct usb_hcd *hcd,
struct urb *urb,
pipe_stop(r8a66597, td->pipe);
pipe_irq_disable(r8a66597, td->pipenum);
disable_irq_empty(r8a66597, td->pipenum);
- finish_request(r8a66597, td, td->pipenum, urb);
+ finish_request(r8a66597, td, td->pipenum, urb, status);
}
done:
spin_unlock_irqrestore(&r8a66597->lock, flags);
@@ -1824,7 +1823,7 @@ static void r8a66597_endpoint_disable(struct usb_hcd *hcd,
td = r8a66597_get_td(r8a66597, pipenum);
if (td)
urb = td->urb;
- finish_request(r8a66597, td, pipenum, urb);
+ finish_request(r8a66597, td, pipenum, urb, -ESHUTDOWN);
kfree(hep->hcpriv);
hep->hcpriv = NULL;
spin_unlock_irqrestore(&r8a66597->lock, flags);
-
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