From: Zhen Lei <thunder.leizhen@huawei.com> To: Jani Nikula <jani.nikula@linux.intel.com>, Joonas Lahtinen <joonas.lahtinen@linux.intel.com>, Rodrigo Vivi <rodrigo.vivi@intel.com>, David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>, intel-gfx <intel-gfx@lists.freedesktop.org>, dri-devel <dri-devel@lists.freedesktop.org>, linux-kernel <linux-kernel@vger.kernel.org> Cc: Zhen Lei <thunder.leizhen@huawei.com> Subject: [PATCH 1/1] drm/i915/hdcp: Simplify code in intel_hdcp_auth_downstream() Date: Thu, 27 May 2021 17:04:21 +0800 [thread overview] Message-ID: <20210527090421.9172-1-thunder.leizhen@huawei.com> (raw) If intel_hdcp_validate_v_prime() has been successful within the allowed number of tries, we can directly call drm_dbg_kms() and "goto out" without jumping out of the loop and repeatedly judging whether the operation is successful. This can help us reduce an unnecessary if judgment. And it's a little clearer to read. No functional change. Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> --- drivers/gpu/drm/i915/display/intel_hdcp.c | 24 ++++++++++------------- 1 file changed, 10 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c index d8570e14fe60..c32a854eda66 100644 --- a/drivers/gpu/drm/i915/display/intel_hdcp.c +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c @@ -663,13 +663,13 @@ int intel_hdcp_auth_downstream(struct intel_connector *connector) ret = shim->read_ksv_fifo(dig_port, num_downstream, ksv_fifo); if (ret) - goto err; + goto out; if (drm_hdcp_check_ksvs_revoked(&dev_priv->drm, ksv_fifo, num_downstream) > 0) { drm_err(&dev_priv->drm, "Revoked Ksv(s) in ksv_fifo\n"); ret = -EPERM; - goto err; + goto out; } /* @@ -680,20 +680,16 @@ int intel_hdcp_auth_downstream(struct intel_connector *connector) ret = intel_hdcp_validate_v_prime(connector, shim, ksv_fifo, num_downstream, bstatus); - if (!ret) - break; - } - - if (i == tries) { - drm_dbg_kms(&dev_priv->drm, - "V Prime validation failed.(%d)\n", ret); - goto err; + if (!ret) { + drm_dbg_kms(&dev_priv->drm, + "HDCP is enabled (%d downstream devices)\n", + num_downstream); + goto out; + } } - drm_dbg_kms(&dev_priv->drm, "HDCP is enabled (%d downstream devices)\n", - num_downstream); - ret = 0; -err: + drm_dbg_kms(&dev_priv->drm, "V Prime validation failed.(%d)\n", ret); +out: kfree(ksv_fifo); return ret; } -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Zhen Lei <thunder.leizhen@huawei.com> To: Jani Nikula <jani.nikula@linux.intel.com>, Joonas Lahtinen <joonas.lahtinen@linux.intel.com>, Rodrigo Vivi <rodrigo.vivi@intel.com>, David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>, intel-gfx <intel-gfx@lists.freedesktop.org>, dri-devel <dri-devel@lists.freedesktop.org>, linux-kernel <linux-kernel@vger.kernel.org> Cc: Zhen Lei <thunder.leizhen@huawei.com> Subject: [Intel-gfx] [PATCH 1/1] drm/i915/hdcp: Simplify code in intel_hdcp_auth_downstream() Date: Thu, 27 May 2021 17:04:21 +0800 [thread overview] Message-ID: <20210527090421.9172-1-thunder.leizhen@huawei.com> (raw) If intel_hdcp_validate_v_prime() has been successful within the allowed number of tries, we can directly call drm_dbg_kms() and "goto out" without jumping out of the loop and repeatedly judging whether the operation is successful. This can help us reduce an unnecessary if judgment. And it's a little clearer to read. No functional change. Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> --- drivers/gpu/drm/i915/display/intel_hdcp.c | 24 ++++++++++------------- 1 file changed, 10 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c index d8570e14fe60..c32a854eda66 100644 --- a/drivers/gpu/drm/i915/display/intel_hdcp.c +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c @@ -663,13 +663,13 @@ int intel_hdcp_auth_downstream(struct intel_connector *connector) ret = shim->read_ksv_fifo(dig_port, num_downstream, ksv_fifo); if (ret) - goto err; + goto out; if (drm_hdcp_check_ksvs_revoked(&dev_priv->drm, ksv_fifo, num_downstream) > 0) { drm_err(&dev_priv->drm, "Revoked Ksv(s) in ksv_fifo\n"); ret = -EPERM; - goto err; + goto out; } /* @@ -680,20 +680,16 @@ int intel_hdcp_auth_downstream(struct intel_connector *connector) ret = intel_hdcp_validate_v_prime(connector, shim, ksv_fifo, num_downstream, bstatus); - if (!ret) - break; - } - - if (i == tries) { - drm_dbg_kms(&dev_priv->drm, - "V Prime validation failed.(%d)\n", ret); - goto err; + if (!ret) { + drm_dbg_kms(&dev_priv->drm, + "HDCP is enabled (%d downstream devices)\n", + num_downstream); + goto out; + } } - drm_dbg_kms(&dev_priv->drm, "HDCP is enabled (%d downstream devices)\n", - num_downstream); - ret = 0; -err: + drm_dbg_kms(&dev_priv->drm, "V Prime validation failed.(%d)\n", ret); +out: kfree(ksv_fifo); return ret; } -- 2.25.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next reply other threads:[~2021-05-27 9:04 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-27 9:04 Zhen Lei [this message] 2021-05-27 9:04 ` [Intel-gfx] [PATCH 1/1] drm/i915/hdcp: Simplify code in intel_hdcp_auth_downstream() Zhen Lei 2021-05-27 10:04 ` Jani Nikula 2021-05-27 10:04 ` [Intel-gfx] " Jani Nikula 2021-05-28 9:36 ` Leizhen (ThunderTown) 2021-05-28 9:36 ` [Intel-gfx] " Leizhen (ThunderTown) 2021-05-31 10:36 ` Jani Nikula 2021-05-31 10:36 ` [Intel-gfx] " Jani Nikula 2021-06-01 20:55 ` [Intel-gfx] ✓ Fi.CI.BAT: success for series starting with [1/1] " Patchwork 2021-06-02 6:38 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20210527090421.9172-1-thunder.leizhen@huawei.com \ --to=thunder.leizhen@huawei.com \ --cc=airlied@linux.ie \ --cc=daniel@ffwll.ch \ --cc=dri-devel@lists.freedesktop.org \ --cc=intel-gfx@lists.freedesktop.org \ --cc=jani.nikula@linux.intel.com \ --cc=joonas.lahtinen@linux.intel.com \ --cc=linux-kernel@vger.kernel.org \ --cc=rodrigo.vivi@intel.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.