mirror of https://gitee.com/openkylin/linux.git
25d5cb4b03
Somehow the spidev code forgot to include a critical mechanism: when the underlying device is removed (e.g. spi_master rmmod), open file descriptors must be prevented from issuing new I/O requests to that device. On penalty of the oopsing reported by Sebastian Siewior <bigeasy@tglx.de> ... This is a partial fix, adding handshaking between the lower level (SPI messaging) and the file operations using the spi_dev. (It also fixes an issue where reads and writes didn't return the number of bytes sent or received.) There's still a refcounting issue to be addressed (separately). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Reported-by: Sebastian Siewior <bigeasy@tglx.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| at25.c | ||
| atmel_spi.c | ||
| atmel_spi.h | ||
| au1550_spi.c | ||
| mpc52xx_psc_spi.c | ||
| omap2_mcspi.c | ||
| omap_uwire.c | ||
| pxa2xx_spi.c | ||
| spi.c | ||
| spi_bfin5xx.c | ||
| spi_bitbang.c | ||
| spi_butterfly.c | ||
| spi_imx.c | ||
| spi_lm70llp.c | ||
| spi_mpc83xx.c | ||
| spi_s3c24xx.c | ||
| spi_s3c24xx_gpio.c | ||
| spi_sh_sci.c | ||
| spi_txx9.c | ||
| spidev.c | ||
| tle62x0.c | ||
| xilinx_spi.c | ||