From: Nirmoy Das nirmoy.das@intel.com
stable inclusion from stable-v6.6.3 commit 8ebe2d452fd0c7e6ac2583e3f41022f60e0f1fd1 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8LBQP
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 9506fba463fcbdf8c8b7af3ec9ee34360df843fe ]
Fix below compiler warning:
intel_tc.c:1879:11: error: ‘%d’ directive output may be truncated writing between 1 and 11 bytes into a region of size 3 [-Werror=format-truncation=] "%c/TC#%d", port_name(port), tc_port + 1); ^~ intel_tc.c:1878:2: note: ‘snprintf’ output between 7 and 17 bytes into a destination of size 8 snprintf(tc->port_name, sizeof(tc->port_name), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "%c/TC#%d", port_name(port), tc_port + 1); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
v2: use kasprintf(Imre) v3: use const for port_name, and fix tc mem leak(Imre)
Fixes: 3eafcddf766b ("drm/i915/tc: Move TC port fields to a new intel_tc_port struct") Cc: Mika Kahola mika.kahola@intel.com Cc: Imre Deak imre.deak@intel.com Cc: Jani Nikula jani.nikula@intel.com Signed-off-by: Nirmoy Das nirmoy.das@intel.com Reviewed-by: Andrzej Hajda andrzej.hajda@intel.com Reviewed-by: Imre Deak imre.deak@intel.com Reviewed-by: Mika Kahola mika.kahola@intel.com Signed-off-by: Jani Nikula jani.nikula@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20231026125636.5080-1-nirmoy.d... (cherry picked from commit 70a3cbbe620ee66afb0c066624196077767e61b2) Signed-off-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/gpu/drm/i915/display/intel_tc.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c index 3ebf41859043..cdf2455440be 100644 --- a/drivers/gpu/drm/i915/display/intel_tc.c +++ b/drivers/gpu/drm/i915/display/intel_tc.c @@ -58,7 +58,7 @@ struct intel_tc_port { struct delayed_work link_reset_work; int link_refcount; bool legacy_port:1; - char port_name[8]; + const char *port_name; enum tc_port_mode mode; enum tc_port_mode init_mode; enum phy_fia phy_fia; @@ -1841,8 +1841,12 @@ int intel_tc_port_init(struct intel_digital_port *dig_port, bool is_legacy) else tc->phy_ops = &icl_tc_phy_ops;
- snprintf(tc->port_name, sizeof(tc->port_name), - "%c/TC#%d", port_name(port), tc_port + 1); + tc->port_name = kasprintf(GFP_KERNEL, "%c/TC#%d", port_name(port), + tc_port + 1); + if (!tc->port_name) { + kfree(tc); + return -ENOMEM; + }
mutex_init(&tc->lock); /* TODO: Combine the two works */ @@ -1863,6 +1867,7 @@ void intel_tc_port_cleanup(struct intel_digital_port *dig_port) { intel_tc_port_suspend(dig_port);
+ kfree(dig_port->tc->port_name); kfree(dig_port->tc); dig_port->tc = NULL; }