> -----Original Message-----
> From: Das, Nirmoy <nirmoy.das@xxxxxxxxx>
> Sent: Thursday, October 26, 2023 3:57 PM
> To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> Cc: Das, Nirmoy <nirmoy.das@xxxxxxxxx>; Kahola, Mika <mika.kahola@xxxxxxxxx>; Deak, Imre <imre.deak@xxxxxxxxx>; Nikula,
> Jani <jani.nikula@xxxxxxxxx>; Hajda, Andrzej <andrzej.hajda@xxxxxxxxx>
> Subject: [PATCH v3] drm/i915/tc: Fix -Wformat-truncation in intel_tc_port_init
>
> 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@xxxxxxxxx>
> Cc: Imre Deak <imre.deak@xxxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
> Signed-off-by: Nirmoy Das <nirmoy.das@xxxxxxxxx>
> Reviewed-by: Andrzej Hajda <andrzej.hajda@xxxxxxxxx>
> Reviewed-by: Imre Deak <imre.deak@xxxxxxxxx>
Reviewed-by: Mika Kahola <mika.kahola@xxxxxxxxx>
> ---
> 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 37b0f8529b4f..f64d348a969e 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;
> @@ -1875,8 +1875,12 @@ 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 */
> @@ -1897,6 +1901,7 @@ 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;
> }
> --
> 2.42.0
