From d2fb1bb32b9b379a029aeca969b45d28bd91ae89 Mon Sep 17 00:00:00 2001 From: Pete Zaitcev Date: Wed, 10 Jun 2009 14:15:52 -0600 Subject: [PATCH] USB: sisusbvga: drop usb_buffer_alloc This patch falls out of my work to fix usbmon so it uses virtual addresses. It is not necessary, the "new" usbmon should work just fine with sisusbvga. However, it seems ridiculous that anyone would use uncached memory to transfer bulk data. Dropping the unnecessary use of usb_buffer_alloc should be beneficial here, in case anyone ever uses the dongle on anything beyond x86. I had no success in raising the author of the driver by e-mail, so the patch is not actually tested. Signed-off-by: Pete Zaitcev Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/sisusbvga/sisusb.c | 53 +++++++---------------------- drivers/usb/misc/sisusbvga/sisusb.h | 2 -- 2 files changed, 13 insertions(+), 42 deletions(-) diff --git a/drivers/usb/misc/sisusbvga/sisusb.c b/drivers/usb/misc/sisusbvga/sisusb.c index b4ec716de7da..0025847743f3 100644 --- a/drivers/usb/misc/sisusbvga/sisusb.c +++ b/drivers/usb/misc/sisusbvga/sisusb.c @@ -79,14 +79,12 @@ sisusb_free_buffers(struct sisusb_usb_data *sisusb) for (i = 0; i < NUMOBUFS; i++) { if (sisusb->obuf[i]) { - usb_buffer_free(sisusb->sisusb_dev, sisusb->obufsize, - sisusb->obuf[i], sisusb->transfer_dma_out[i]); + kfree(sisusb->obuf[i]); sisusb->obuf[i] = NULL; } } if (sisusb->ibuf) { - usb_buffer_free(sisusb->sisusb_dev, sisusb->ibufsize, - sisusb->ibuf, sisusb->transfer_dma_in); + kfree(sisusb->ibuf); sisusb->ibuf = NULL; } } @@ -230,8 +228,7 @@ sisusb_bulk_completeout(struct urb *urb) static int sisusb_bulkout_msg(struct sisusb_usb_data *sisusb, int index, unsigned int pipe, void *data, - int len, int *actual_length, int timeout, unsigned int tflags, - dma_addr_t transfer_dma) + int len, int *actual_length, int timeout, unsigned int tflags) { struct urb *urb = sisusb->sisurbout[index]; int retval, byteswritten = 0; @@ -245,9 +242,6 @@ sisusb_bulkout_msg(struct sisusb_usb_data *sisusb, int index, unsigned int pipe, urb->transfer_flags |= tflags; urb->actual_length = 0; - if ((urb->transfer_dma = transfer_dma)) - urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; - /* Set up context */ sisusb->urbout_context[index].actual_length = (timeout) ? NULL : actual_length; @@ -297,8 +291,8 @@ sisusb_bulk_completein(struct urb *urb) } static int -sisusb_bulkin_msg(struct sisusb_usb_data *sisusb, unsigned int pipe, void *data, int len, - int *actual_length, int timeout, unsigned int tflags, dma_addr_t transfer_dma) +sisusb_bulkin_msg(struct sisusb_usb_data *sisusb, unsigned int pipe, void *data, + int len, int *actual_length, int timeout, unsigned int tflags) { struct urb *urb = sisusb->sisurbin; int retval, readbytes = 0; @@ -311,9 +305,6 @@ sisusb_bulkin_msg(struct sisusb_usb_data *sisusb, unsigned int pipe, void *data, urb->transfer_flags |= tflags; urb->actual_length = 0; - if ((urb->transfer_dma = transfer_dma)) - urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; - sisusb->completein = 0; retval = usb_submit_urb(urb, GFP_ATOMIC); if (retval == 0) { @@ -422,8 +413,7 @@ static int sisusb_send_bulk_msg(struct sisusb_usb_data *sisusb, int ep, int len, thispass, &transferred_len, async ? 0 : 5 * HZ, - tflags, - sisusb->transfer_dma_out[index]); + tflags); if (result == -ETIMEDOUT) { @@ -432,29 +422,16 @@ static int sisusb_send_bulk_msg(struct sisusb_usb_data *sisusb, int ep, int len, return -ETIME; continue; + } - } else if ((result == 0) && !async && transferred_len) { + if ((result == 0) && !async && transferred_len) { thispass -= transferred_len; - if (thispass) { - if (sisusb->transfer_dma_out) { - /* If DMA, copy remaining - * to beginning of buffer - */ - memcpy(buffer, - buffer + transferred_len, - thispass); - } else { - /* If not DMA, simply increase - * the pointer - */ - buffer += transferred_len; - } - } + buffer += transferred_len; } else break; - }; + } if (result) return result; @@ -530,8 +507,7 @@ static int sisusb_recv_bulk_msg(struct sisusb_usb_data *sisusb, int ep, int len, thispass, &transferred_len, 5 * HZ, - tflags, - sisusb->transfer_dma_in); + tflags); if (transferred_len) thispass = transferred_len; @@ -3132,8 +3108,7 @@ static int sisusb_probe(struct usb_interface *intf, /* Allocate buffers */ sisusb->ibufsize = SISUSB_IBUF_SIZE; - if (!(sisusb->ibuf = usb_buffer_alloc(dev, SISUSB_IBUF_SIZE, - GFP_KERNEL, &sisusb->transfer_dma_in))) { + if (!(sisusb->ibuf = kmalloc(SISUSB_IBUF_SIZE, GFP_KERNEL))) { dev_err(&sisusb->sisusb_dev->dev, "Failed to allocate memory for input buffer"); retval = -ENOMEM; goto error_2; @@ -3142,9 +3117,7 @@ static int sisusb_probe(struct usb_interface *intf, sisusb->numobufs = 0; sisusb->obufsize = SISUSB_OBUF_SIZE; for (i = 0; i < NUMOBUFS; i++) { - if (!(sisusb->obuf[i] = usb_buffer_alloc(dev, SISUSB_OBUF_SIZE, - GFP_KERNEL, - &sisusb->transfer_dma_out[i]))) { + if (!(sisusb->obuf[i] = kmalloc(SISUSB_OBUF_SIZE, GFP_KERNEL))) { if (i == 0) { dev_err(&sisusb->sisusb_dev->dev, "Failed to allocate memory for output buffer\n"); retval = -ENOMEM; diff --git a/drivers/usb/misc/sisusbvga/sisusb.h b/drivers/usb/misc/sisusbvga/sisusb.h index cf0b4a5883f6..55492a5930bd 100644 --- a/drivers/usb/misc/sisusbvga/sisusb.h +++ b/drivers/usb/misc/sisusbvga/sisusb.h @@ -123,8 +123,6 @@ struct sisusb_usb_data { int numobufs; /* number of obufs = number of out urbs */ char *obuf[NUMOBUFS], *ibuf; /* transfer buffers */ int obufsize, ibufsize; - dma_addr_t transfer_dma_out[NUMOBUFS]; - dma_addr_t transfer_dma_in; struct urb *sisurbout[NUMOBUFS]; struct urb *sisurbin; unsigned char urbstatus[NUMOBUFS]; -- 2.30.2