user/sven/linux.git/drivers/dma, branch v4.4.29

dmaengine: ipu: remove bogus NO_IRQ reference

2016-10-31T10:14:00Z

commit 86c7e6836479c4045a9a81ed5ea76c51d719f9c1 upstream. A workaround for a warning introduced a use of the NO_IRQ macro that should have been gone for a long time. It is clear from the code that the value cannot actually be used, but apparently there was a configuration at some point that caused a warning, so instead of just reverting that patch, this rearranges the code in a way that the warning cannot reappear. Signed-off-by: Arnd Bergmann Fixes: 6ef41cf6f721 ("dmaengine :ipu: change ipu_irq_handler() to remove compile warning") Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

dmaengine: at_xdmac: fix to pass correct device identity to free_irq()

2016-10-07T13:23:46Z

commit 6a8b0c6b18f62a277ffb2139d0c0253fe35d7feb upstream. free_irq() expects the same device identity that was passed to corresponding request_irq(), otherwise the IRQ is not freed. Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver") Signed-off-by: Wei Yongjun Acked-by: Ludovic Desroches Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

dmaengine: at_xdmac: fix debug string

2016-10-07T13:23:45Z

commit 3935e08768ff777da6496521b1fc36f72823672c upstream. mbr_ds is an integer, don't use %pad to print it. Fixes: commit 268914f4e7a0 ("dmaengine: at_xdmac: use %pad format string for dma_addr_t") Reported-by: Dan Carpenter Signed-off-by: Alexandre Belloni Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

dmaengine: usb-dmac: check CHCR.DE bit in usb_dmac_isr_channel()

2016-09-07T06:32:44Z

commit 626d2f07de89bf6be3d7301524d0ab3375b81b9c upstream. The USB-DMAC's interruption happens even if the CHCR.DE is not set to 1 because CHCR.NULLE is set to 1. So, this driver should call usb_dmac_isr_transfer_end() if the DE bit is set to 1 only. Otherwise, the desc is possible to be NULL in the usb_dmac_isr_transfer_end(). Fixes: 0c1c8ff32fa2 ("dmaengine: usb-dmac: Add Renesas USB DMA Controller (USB-DMAC) driver) Signed-off-by: Yoshihiro Shimoda Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

dmaengine: at_xdmac: double FIFO flush needed to compute residue

2016-08-10T09:49:25Z

commit 9295c41d77ca93aac79cfca6fa09fa1ca5cab66f upstream. Due to the way CUBC register is updated, a double flush is needed to compute an accurate residue. First flush aim is to get data from the DMA FIFO and second one ensures that we won't report data which are not in memory. Signed-off-by: Ludovic Desroches Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver") Reviewed-by: Nicolas Ferre Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

dmaengine: at_xdmac: fix residue corruption

2016-08-10T09:49:24Z

commit 53398f488821c2b5b15291e3debec6ad33f75d3d upstream. An unexpected value of CUBC can lead to a corrupted residue. A more complex sequence is needed to detect an inaccurate value for NCA or CUBC. Signed-off-by: Ludovic Desroches Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver") Reviewed-by: Nicolas Ferre Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

dmaengine: at_xdmac: align descriptors on 64 bits

2016-08-10T09:49:24Z

commit 4a9723e8df68cfce4048517ee32e37f78854b6fb upstream. Having descriptors aligned on 64 bits allows update CNDA and CUBC in an atomic way. Signed-off-by: Ludovic Desroches Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver") Reviewed-by: Nicolas Ferre Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

dmaengine: pxa_dma: fix the maximum requestor line

2016-05-04T21:48:42Z

commit 6bab1c6afdca0371cfa957079b36b78d12dd2cf5 upstream. The current number of requestor lines is limited to 31. This was an error of a previous commit, as this number is platform dependent, and is actually : - for pxa25x: 40 requestor lines - for pxa27x: 75 requestor lines - for pxa3xx: 100 requestor lines The previous testing did not reveal the faulty constant as on pxa[23]xx platforms, only camera, MSL and USB are above requestor 32, and in these only the camera has a driver using dma. Fixes: e87ffbdf0697 ("dmaengine: pxa_dma: fix the no-requestor case") Signed-off-by: Robert Jarzmik Acked-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

dmaengine: hsu: correct use of channel status register

2016-05-04T21:48:42Z

commit 4f4bc0abff79dc9d7ccbd3143adbf8ad1f4fe6ab upstream. There is a typo in documentation regarding to descriptor empty bit (DESCE) which is set to 1 when descriptor is empty. Thus, status register at the end of a transfer usually returns all DESCE bits set and thus it will never be zero. Moreover, there are 2 bits (CDESC) that encode current descriptor, on which interrupt has been asserted. In case when we have few descriptors programmed we might have non-zero value. Remove DESCE and CDESC bits from DMA channel status register (HSU_CH_SR) when reading it. Fixes: 2b49e0c56741 ("dmaengine: append hsu DMA driver") Signed-off-by: Andy Shevchenko Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

dmaengine: dw: fix master selection

2016-05-04T21:48:42Z

commit 3fe6409c23e2bee4b2b1b6d671d2da8daa15271c upstream. The commit 895005202987 ("dmaengine: dw: apply both HS interfaces and remove slave_id usage") cleaned up the code to avoid usage of depricated slave_id member of generic slave configuration. Meanwhile it broke the master selection by removing important call to dwc_set_masters() in ->device_alloc_chan_resources() which copied masters from custom slave configuration to the internal channel structure. Everything works until now since there is no customized connection of DesignWare DMA IP to the bus, i.e. one bus and one or more masters are in use. The configurations where 2 masters are connected to the different masters are not working anymore. We are expecting one user of such configuration and need to select masters properly. Besides that it is obviously a performance regression since only one master is in use in multi-master configuration. Select masters in accordance with what user asked for. Keep this patch in a form more suitable for back porting. We are safe to take necessary data in ->device_alloc_chan_resources() because we don't support generic slave configuration embedded into custom one, and thus the only way to provide such is to use the parameter to a filter function which is called exactly before channel resource allocation. While here, replase BUG_ON to less noisy dev_warn() and prevent channel allocation in case of error. Fixes: 895005202987 ("dmaengine: dw: apply both HS interfaces and remove slave_id usage") Signed-off-by: Andy Shevchenko Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman