Edward O'Callaghan has submitted this change. ( https://review.coreboot.org/c/flashrom/+/52284 )
Change subject: linux_spi.c: Separate shutdown from failed init cleanup ......................................................................
linux_spi.c: Separate shutdown from failed init cleanup
Shutdown function was covering two different jobs here: 1) the actual shutdown which is run at the end of the driver's lifecycle and 2) cleanup in cases when initialisation failed. Now, shutdown is only doing its main job (#1), and the driver itself is doing cleanup when init fails (#2).
The good thing is that now resources are released/closed immediately in cases when init fails (vs shutdown function which was run at some point later), and the driver leaves clean space after itself if init fails.
And very importantly this unlocks API change which plans to move register_shutdown inside register master API, see this https://review.coreboot.org/c/flashrom/+/51761
TEST=builds BUG=b:140394053
Change-Id: I1c8da2878cd0e85a1e43ba9b4b8e6f3d9f38ae5c Signed-off-by: Anastasia Klimchuk aklm@chromium.org Reviewed-on: https://review.coreboot.org/c/flashrom/+/52284 Tested-by: build bot (Jenkins) no-reply@coreboot.org Reviewed-by: Edward O'Callaghan quasisec@chromium.org --- M linux_spi.c 1 file changed, 18 insertions(+), 7 deletions(-)
Approvals: build bot (Jenkins): Verified Edward O'Callaghan: Looks good to me, approved
diff --git a/linux_spi.c b/linux_spi.c index b3cbf97..ae5c318 100644 --- a/linux_spi.c +++ b/linux_spi.c @@ -167,6 +167,7 @@ /* SPI mode 0 (beware this also includes: MSB first, CS active low and others */ const uint8_t mode = SPI_MODE_0; const uint8_t bits = 8; + int ret = 0;
p = extract_programmer_param("spispeed"); if (p && strlen(p)) { @@ -200,34 +201,44 @@ } free(dev);
- if (register_shutdown(linux_spi_shutdown, NULL)) - return 1; - /* We rely on the shutdown function for cleanup from here on. */ - if (ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed_hz) == -1) { msg_perr("%s: failed to set speed to %"PRIu32"Hz: %s\n", __func__, speed_hz, strerror(errno)); - return 1; + ret = 1; + goto init_err; } msg_pdbg("Using %"PRIu32"kHz clock\n", speed_hz / 1000);
if (ioctl(fd, SPI_IOC_WR_MODE, &mode) == -1) { msg_perr("%s: failed to set SPI mode to 0x%02x: %s\n", __func__, mode, strerror(errno)); - return 1; + ret = 1; + goto init_err; }
if (ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits) == -1) { msg_perr("%s: failed to set the number of bits per SPI word to %u: %s\n", __func__, bits == 0 ? 8 : bits, strerror(errno)); - return 1; + ret = 1; + goto init_err; }
max_kernel_buf_size = get_max_kernel_buf_size(); msg_pdbg("%s: max_kernel_buf_size: %zu\n", __func__, max_kernel_buf_size);
+ if (register_shutdown(linux_spi_shutdown, NULL)) { + ret = 1; + goto init_err; + } register_spi_master(&spi_master_linux); return 0; + +init_err: + if (fd != -1) { + close(fd); + fd = -1; + } + return ret; }
#endif // CONFIG_LINUX_SPI == 1