kernel/drivers/tty/serial/8250, branch linux-5.1.y

Revert "serial: 8250: Don't service RX FIFO if interrupts are disabled"

2019-07-14T06:09:49Z

commit 3f2640ed7be838c3f05c0d2b0f7c7508e7431e48 upstream. This reverts commit 2e9fe539108320820016f78ca7704a7342788380. Reading LSR unconditionally but processing the error flags only if UART_IIR_RDI bit was set before in IIR may lead to a loss of transmission error information on UARTs where the transmission error flags are cleared by a read of LSR. Information are lost in case an error is detected right before the read of LSR while processing e.g. an UART_IIR_THRI interrupt. Signed-off-by: Oliver Barta Reviewed-by: Andy Shevchenko Fixes: 2e9fe5391083 ("serial: 8250: Don't service RX FIFO if interrupts are disabled") Cc: stable Signed-off-by: Greg Kroah-Hartman

dmaengine: idma64: Use actual device for DMA transfers

2019-06-15T09:53:05Z

[ Upstream commit 5ba846b1ee0792f5a596b9b0b86d6e8cdebfab06 ] Intel IOMMU, when enabled, tries to find the domain of the device, assuming it's a PCI one, during DMA operations, such as mapping or unmapping. Since we are splitting the actual PCI device to couple of children via MFD framework (see drivers/mfd/intel-lpss.c for details), the DMA device appears to be a platform one, and thus not an actual one that performs DMA. In a such situation IOMMU can't find or allocate a proper domain for its operations. As a result, all DMA operations are failed. In order to fix this, supply parent of the platform device to the DMA engine framework and fix filter functions accordingly. We may rely on the fact that parent is a real PCI device, because no other configuration is present in the wild. Signed-off-by: Andy Shevchenko Acked-by: Mark Brown Acked-by: Greg Kroah-Hartman [for tty parts] Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

Merge tag 'dmaengine-5.1-rc1' of git://git.infradead.org/users/vkoul/slave-dma

2019-03-14T16:11:54Z

Pull dmaengine updates from Vinod Koul: - dmatest updates for modularizing common struct and code - remove SG support for VDMA xilinx IP and updates to driver - Update to dw driver to support Intel iDMA controllers multi-block support - tegra updates for proper reporting of residue - Add Snow Ridge ioatdma device id and support for IOATDMA v3.4 - struct_size() usage and useless LIST_HEAD cleanups in subsystem. - qDMA controller driver for Layerscape SoCs - stm32-dma PM Runtime support - And usual updates to imx-sdma, sprd, Documentation, fsl-edma, bcm2835, qcom_hidma etc * tag 'dmaengine-5.1-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (81 commits) dmaengine: imx-sdma: fix consistent dma test failures dmaengine: imx-sdma: add a test for imx8mq multi sdma devices dmaengine: imx-sdma: add clock ratio 1:1 check dmaengine: dmatest: move test data alloc & free into functions dmaengine: dmatest: add short-hand `buf_size` var in dmatest_func() dmaengine: dmatest: wrap src & dst data into a struct dmaengine: ioatdma: support latency tolerance report (LTR) for v3.4 dmaengine: ioatdma: add descriptor pre-fetch support for v3.4 dmaengine: ioatdma: disable DCA enabling on IOATDMA v3.4 dmaengine: ioatdma: Add Snow Ridge ioatdma device id dmaengine: sprd: Change channel id to slave id for DMA cell specifier dt-bindings: dmaengine: sprd: Change channel id to slave id for DMA cell specifier dmaengine: mv_xor: Use correct device for DMA API Documentation :dmaengine: clarify DMA desc. pointer after submission Documentation: dmaengine: fix dmatest.rst warning dmaengine: k3dma: Add support for dma-channel-mask dmaengine: k3dma: Delete axi_config dmaengine: k3dma: Upgrade k3dma driver to support hisi_asp_dma hardware Documentation: bindings: dma: Add binding for dma-channel-mask Documentation: bindings: k3dma: Extend the k3dma driver binding to support hisi-asp ...

serial: 8250_of: assume reg-shift of 2 for mrvl,mmp-uart

2019-02-26T11:30:45Z

There are two other drivers that bind to mrvl,mmp-uart and both of them assume register shift of 2 bits. There are device trees that lack the property and rely on that assumption. If this driver wins the race to bind to those devices, it should behave the same as the older deprecated driver. Signed-off-by: Lubomir Rintel Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman

serial: 8250_pxa: honor the port number from devicetree

2019-02-26T11:30:44Z

Like the other OF-enabled drivers, use the port number from the firmware if the devicetree specifies an alias: aliases { ... serial2 = &uart2; /* Should be ttyS2 */ } This is how the deprecated pxa.c driver behaved, switching to 8250_pxa messes up the numbering. Signed-off-by: Lubomir Rintel Signed-off-by: Greg Kroah-Hartman

serial: 8250_pci: Have ACCES cards that use the four port Pericom PI7C9X7954 chip use the pci_pericom_setup()

2019-02-13T18:48:57Z

The four port Pericom chips have the fourth port at the wrong address. Make use of quirk to fix it. Fixes: c8d192428f52 ("serial: 8250: added acces i/o products quad and octal serial cards") Cc: stable Signed-off-by: Jay Dolan Signed-off-by: Greg Kroah-Hartman

serial: 8250_pci: Fix number of ports for ACCES serial cards

2019-02-13T18:48:50Z

Have the correct number of ports created for ACCES serial cards. Two port cards show up as four ports, and four port cards show up as eight. Fixes: c8d192428f52 ("serial: 8250: added acces i/o products quad and octal serial cards") Signed-off-by: Jay Dolan Cc: stable Signed-off-by: Greg Kroah-Hartman

serial: 8250_pci: Replace custom code with pci_match_id()

2019-02-11T08:55:50Z

serial_pci_is_blacklisted() is very similar to pci_match_id() implementation. Replace it with the latter. Signed-off-by: Heikki Krogerus Signed-off-by: Andy Shevchenko Signed-off-by: Greg Kroah-Hartman

Merge 5.0-rc6 into tty-next

2019-02-11T08:26:45Z

We need the tty fixes in here for other patches to be based on. Signed-off-by: Greg Kroah-Hartman

serial: 8250_pci: Make PCI class test non fatal

2019-01-30T08:35:46Z

As has been reported the National Instruments serial cards have broken PCI class. The commit 7d8905d06405 ("serial: 8250_pci: Enable device after we check black list") made the PCI class check mandatory for the case when device is listed in a quirk list. Make PCI class test non fatal to allow broken card be enumerated. Fixes: 7d8905d06405 ("serial: 8250_pci: Enable device after we check black list") Cc: stable Reported-by: Guan Yung Tseng Tested-by: Guan Yung Tseng Tested-by: KHUENY.Gerhard Signed-off-by: Andy Shevchenko Signed-off-by: Greg Kroah-Hartman