From 888fda47051716765175d0008450126c837adb32 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Fri, 24 Aug 2007 15:41:18 -0400 Subject: [PATCH] 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 CC: Yoshihiro Shimoda Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/r8a66597-hcd.c | 61 ++++++++++++++++----------------- 1 file changed, 30 insertions(+), 31 deletions(-) diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c index 98b9e0547544..fea6036771f6 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);