From: Itai Katz Date: Mon, 11 Apr 2016 16:55:40 +0000 (-0500) Subject: staging: fsl-mc: don't use object versions to make binding decisions X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9787d4e05e022de73eafdf70319ae26a4978a7b9;p=linux-beck.git staging: fsl-mc: don't use object versions to make binding decisions Up until now if the object version expected by a driver (in the API header file) did not match the actual object version in the MC hardware the bus driver refused to bind the object to the driver or printed out WARN_ON dumps. This patch removes those checks, and the responsibility of object version checking should now be done in the object drivers themselves. If the actual version discovered is not supported, the driver's probe function should fail. Drivers should use version checks to support new features and provide backwards compatibility if at all possible. This patch also removes the checks that caused bus driver probing to fail if the overall MC version discovered did not match the firmware version from the API header...this was too strict. The overall MC version is informational like a release number, and continues to be printed in the boot log. Signed-off-by: Itai Katz (Stuart: reworded commit log) Signed-off-by: Stuart Yoder Acked-by: German Rivera Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/fsl-mc/bus/dprc-driver.c b/drivers/staging/fsl-mc/bus/dprc-driver.c index 4334f3c287ec..2d88c106b974 100644 --- a/drivers/staging/fsl-mc/bus/dprc-driver.c +++ b/drivers/staging/fsl-mc/bus/dprc-driver.c @@ -780,9 +780,7 @@ static int dprc_remove(struct fsl_mc_device *mc_dev) static const struct fsl_mc_device_match_id match_id_table[] = { { .vendor = FSL_MC_VENDOR_FREESCALE, - .obj_type = "dprc", - .ver_major = DPRC_VER_MAJOR, - .ver_minor = DPRC_VER_MINOR}, + .obj_type = "dprc"}, {.vendor = 0x0}, }; diff --git a/drivers/staging/fsl-mc/bus/mc-allocator.c b/drivers/staging/fsl-mc/bus/mc-allocator.c index bdb4b0e0889d..73a75a65d984 100644 --- a/drivers/staging/fsl-mc/bus/mc-allocator.c +++ b/drivers/staging/fsl-mc/bus/mc-allocator.c @@ -709,20 +709,14 @@ static const struct fsl_mc_device_match_id match_id_table[] = { { .vendor = FSL_MC_VENDOR_FREESCALE, .obj_type = "dpbp", - .ver_major = DPBP_VER_MAJOR, - .ver_minor = DPBP_VER_MINOR }, { .vendor = FSL_MC_VENDOR_FREESCALE, .obj_type = "dpmcp", - .ver_major = DPMCP_VER_MAJOR, - .ver_minor = DPMCP_VER_MINOR }, { .vendor = FSL_MC_VENDOR_FREESCALE, .obj_type = "dpcon", - .ver_major = DPCON_VER_MAJOR, - .ver_minor = DPCON_VER_MINOR }, {.vendor = 0x0}, }; diff --git a/drivers/staging/fsl-mc/bus/mc-bus.c b/drivers/staging/fsl-mc/bus/mc-bus.c index b59455661f4d..981e4c255ca2 100644 --- a/drivers/staging/fsl-mc/bus/mc-bus.c +++ b/drivers/staging/fsl-mc/bus/mc-bus.c @@ -40,8 +40,6 @@ static int fsl_mc_bus_match(struct device *dev, struct device_driver *drv) struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(drv); bool found = false; - bool major_version_mismatch = false; - bool minor_version_mismatch = false; if (WARN_ON(!fsl_mc_bus_exists())) goto out; @@ -64,32 +62,12 @@ static int fsl_mc_bus_match(struct device *dev, struct device_driver *drv) for (id = mc_drv->match_id_table; id->vendor != 0x0; id++) { if (id->vendor == mc_dev->obj_desc.vendor && strcmp(id->obj_type, mc_dev->obj_desc.type) == 0) { - if (id->ver_major == mc_dev->obj_desc.ver_major) { - found = true; - if (id->ver_minor != mc_dev->obj_desc.ver_minor) - minor_version_mismatch = true; - } else { - major_version_mismatch = true; - } + found = true; break; } } - if (major_version_mismatch) { - dev_warn(dev, - "Major version mismatch: driver version %u.%u, MC object version %u.%u\n", - id->ver_major, id->ver_minor, - mc_dev->obj_desc.ver_major, - mc_dev->obj_desc.ver_minor); - } else if (minor_version_mismatch) { - dev_warn(dev, - "Minor version mismatch: driver version %u.%u, MC object version %u.%u\n", - id->ver_major, id->ver_minor, - mc_dev->obj_desc.ver_major, - mc_dev->obj_desc.ver_minor); - } - out: dev_dbg(dev, "%smatched\n", found ? "" : "not "); return found; @@ -722,20 +700,6 @@ static int fsl_mc_bus_probe(struct platform_device *pdev) "Freescale Management Complex Firmware version: %u.%u.%u\n", mc_version.major, mc_version.minor, mc_version.revision); - if (mc_version.major < MC_VER_MAJOR) { - dev_err(&pdev->dev, - "ERROR: MC firmware version not supported by driver (driver version: %u.%u)\n", - MC_VER_MAJOR, MC_VER_MINOR); - error = -ENOTSUPP; - goto error_cleanup_mc_io; - } - - if (mc_version.major > MC_VER_MAJOR) { - dev_warn(&pdev->dev, - "WARNING: driver may not support newer MC firmware features (driver version: %u.%u)\n", - MC_VER_MAJOR, MC_VER_MINOR); - } - error = get_mc_addr_translation_ranges(&pdev->dev, &mc->translation_ranges, &mc->num_translation_ranges);