kernel/git/stable/linux.git/drivers/i2c/busses, branch linux-3.2.y

i2c: i2c-tiny-usb: fix buffer not being DMA capable

2017-09-15T17:30:46+00:00

commit 5165da5923d6c7df6f2927b0113b2e4d9288661e upstream. Since v4.9 i2c-tiny-usb generates the below call trace and longer works, since it can't communicate with the USB device. The reason is, that since v4.9 the USB stack checks, that the buffer it should transfer is DMA capable. This was a requirement since v2.2 days, but it usually worked nevertheless. [ 17.504959] ------------[ cut here ]------------ [ 17.505488] WARNING: CPU: 0 PID: 93 at drivers/usb/core/hcd.c:1587 usb_hcd_map_urb_for_dma+0x37c/0x570 [ 17.506545] transfer buffer not dma capable [ 17.507022] Modules linked in: [ 17.507370] CPU: 0 PID: 93 Comm: i2cdetect Not tainted 4.11.0-rc8+ #10 [ 17.508103] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 [ 17.509039] Call Trace: [ 17.509320] ? dump_stack+0x5c/0x78 [ 17.509714] ? __warn+0xbe/0xe0 [ 17.510073] ? warn_slowpath_fmt+0x5a/0x80 [ 17.510532] ? nommu_map_sg+0xb0/0xb0 [ 17.510949] ? usb_hcd_map_urb_for_dma+0x37c/0x570 [ 17.511482] ? usb_hcd_submit_urb+0x336/0xab0 [ 17.511976] ? wait_for_completion_timeout+0x12f/0x1a0 [ 17.512549] ? wait_for_completion_timeout+0x65/0x1a0 [ 17.513125] ? usb_start_wait_urb+0x65/0x160 [ 17.513604] ? usb_control_msg+0xdc/0x130 [ 17.514061] ? usb_xfer+0xa4/0x2a0 [ 17.514445] ? __i2c_transfer+0x108/0x3c0 [ 17.514899] ? i2c_transfer+0x57/0xb0 [ 17.515310] ? i2c_smbus_xfer_emulated+0x12f/0x590 [ 17.515851] ? _raw_spin_unlock_irqrestore+0x11/0x20 [ 17.516408] ? i2c_smbus_xfer+0x125/0x330 [ 17.516876] ? i2c_smbus_xfer+0x125/0x330 [ 17.517329] ? i2cdev_ioctl_smbus+0x1c1/0x2b0 [ 17.517824] ? i2cdev_ioctl+0x75/0x1c0 [ 17.518248] ? do_vfs_ioctl+0x9f/0x600 [ 17.518671] ? vfs_write+0x144/0x190 [ 17.519078] ? SyS_ioctl+0x74/0x80 [ 17.519463] ? entry_SYSCALL_64_fastpath+0x1e/0xad [ 17.519959] ---[ end trace d047c04982f5ac50 ]--- Signed-off-by: Sebastian Reichel Reviewed-by: Greg Kroah-Hartman Acked-by: Till Harbaum Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c-eg20t: fix race between i2c init and interrupt enable

2016-11-20T01:01:42+00:00

commit 371a015344b6e270e7e3632107d9554ec6d27a6b upstream. the eg20t driver call request_irq() function before the pch_base_address, base address of i2c controller's register, is assigned an effective value. there is one possible scenario that an interrupt which isn't inside eg20t arrives immediately after request_irq() is executed when i2c controller shares an interrupt number with others. since the interrupt handler pch_i2c_handler() has already active as shared action, it will be called and read its own register to determine if this interrupt is from itself. At that moment, since base address of i2c registers is not remapped in kernel space yet,so the INT handler will access an illegal address and then a error occurs. Signed-off-by: Yadi.hu Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: add Intel Lewisburg device IDs

2016-01-22T21:40:13+00:00

commit cdc5a3110e7c3ae793f367285789a6bc39c962dc upstream. Adding Intel codename Lewisburg platform device IDs for SMBus. Signed-off-by: Alexandra Yates Reviewed-by: Jean Delvare Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: Document Intel DNV and Broxton

2016-01-22T21:40:12+00:00

commit 2b630df721ee4c286d286ab5d5d958d34c86f067 upstream. Add missing entries into i2c-i801 documentation and Kconfig about recently added Intel DNV and Broxton. Reported-by: Jean Delvare Signed-off-by: Jarkko Nikula Reviewed-by: Mika Westerberg Reviewed-by: Jean Delvare Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: Add support for Intel Broxton

2016-01-22T21:40:12+00:00

commit dd77f423e516293c37c2370b44fd700900409c48 upstream. This patch adds the SMBUS PCI ID of Intel Broxton. Signed-off-by: Jarkko Nikula Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: Add support for Intel DNV

2016-01-22T21:40:12+00:00

commit 84d7f2ebd70d36e9d83e0973d2f4dac56a671f4f upstream. Intel DNV SoC has the same legacy SMBus host controller than Intel Sunrisepoint PCH. It also has same iTCO watchdog on the bus. Add DNV PCI ID to the list of supported devices. Signed-off-by: Mika Westerberg Signed-off-by: Wolfram Sang [bwh: Backported to 3.2: no FEATURE_IRQ or FEATURE_TCO here] Signed-off-by: Ben Hutchings

i2c: i801: Add DeviceIDs for SunrisePoint LP

2016-01-22T21:40:12+00:00

commit 3eee1799aed90e990e02a73a89bfcff1982c74dd upstream. Signed-off-by: Devin Ryles Reviewed-by: Jean Delvare Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: Add Device IDs for Intel Sunrise Point PCH

2016-01-22T21:40:12+00:00

commit 3e27a8445c21f8056517f188303827450590d868 upstream. This patch adds the I2C/SMBus Device IDs for the Intel Sunrise Point PCH. Signed-off-by: James Ralston Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: Add PCI ID for Intel Braswell

2016-01-22T21:40:12+00:00

commit 39e8e30ee544a62c148033d64a979028b958ca05 upstream. The SMBus host controller is the same as used in Baytrail so add the new PCI ID to the driver's list of supported IDs. Signed-off-by: Alan Cox Signed-off-by: Mika Westerberg Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings

i2c: i801: Add device ID for Intel Wildcat Point PCH

2016-01-22T21:40:12+00:00

commit b299de839157852c563b9f133c8b7e630545a9c3 upstream. Signed-off-by: Jean Delvare Signed-off-by: Wolfram Sang Signed-off-by: Ben Hutchings