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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-03 19:48:58 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-03 19:48:58 +0300 |
| commit | 7f5b09c15ab989ed5ce4adda0be42c1302df70b7 (patch) | |
| tree | 9695b00983d1bd077ff91c463abcb136330cf344 /drivers/usb/musb/musbhsdma.c | |
| parent | 94468080220162f74dc6ce5c3e95e5fec8022902 (diff) | |
| parent | cedf8a78421943441b9011ce7bcdab55f07d2ea6 (diff) | |
| download | linux-7f5b09c15ab989ed5ce4adda0be42c1302df70b7.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (220 commits)
USB: backlight, appledisplay: fix incomplete registration failure handling
USB: pl2303: remove unnecessary reset of usb_device in urbs
USB: ftdi_sio: remove obsolete check in unthrottle
USB: ftdi_sio: remove unused tx_bytes counter
USB: qcaux: driver for auxiliary serial ports on Qualcomm devices
USB: pl2303: initial TIOCGSERIAL support
USB: option: add Longcheer/Longsung vendor ID
USB: fix I2C API usage in ohci-pnx4008.
USB: usbmon: mask seconds properly in text API
USB: sisusbvga: no unnecessary GFP_ATOMIC
USB: storage: onetouch: unnecessary GFP_ATOMIC
USB: serial: ftdi: add CONTEC vendor and product id
USB: remove references to port->port.count from the serial drivers
USB: tty: Prune uses of tty_request_room in the USB layer
USB: tty: Add a function to insert a string of characters with the same flag
USB: don't read past config->interface[] if usb_control_msg() fails in usb_reset_configuration()
USB: tty: kill request_room for USB ACM class
USB: tty: sort out the request_room handling for whiteheat
USB: storage: fix misplaced parenthesis
USB: vstusb.c: removal of driver for Vernier Software & Technology, Inc., devices and spectrometers
...
Diffstat (limited to 'drivers/usb/musb/musbhsdma.c')
| -rw-r--r-- | drivers/usb/musb/musbhsdma.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c index a237550f91bf..2fa7d5c00f31 100644 --- a/drivers/usb/musb/musbhsdma.c +++ b/drivers/usb/musb/musbhsdma.c @@ -250,20 +250,39 @@ static irqreturn_t dma_controller_irq(int irq, void *private_data) u8 bchannel; u8 int_hsdma; - u32 addr; + u32 addr, count; u16 csr; spin_lock_irqsave(&musb->lock, flags); int_hsdma = musb_readb(mbase, MUSB_HSDMA_INTR); - if (!int_hsdma) - goto done; #ifdef CONFIG_BLACKFIN /* Clear DMA interrupt flags */ musb_writeb(mbase, MUSB_HSDMA_INTR, int_hsdma); #endif + if (!int_hsdma) { + DBG(2, "spurious DMA irq\n"); + + for (bchannel = 0; bchannel < MUSB_HSDMA_CHANNELS; bchannel++) { + musb_channel = (struct musb_dma_channel *) + &(controller->channel[bchannel]); + channel = &musb_channel->channel; + if (channel->status == MUSB_DMA_STATUS_BUSY) { + count = musb_read_hsdma_count(mbase, bchannel); + + if (count == 0) + int_hsdma |= (1 << bchannel); + } + } + + DBG(2, "int_hsdma = 0x%x\n", int_hsdma); + + if (!int_hsdma) + goto done; + } + for (bchannel = 0; bchannel < MUSB_HSDMA_CHANNELS; bchannel++) { if (int_hsdma & (1 << bchannel)) { musb_channel = (struct musb_dma_channel *) |