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([2602:4b:a6ae:c000:6d4:c4ff:fe4a:ea6b]) by smtp.gmail.com with ESMTPSA id y26sm994249ooq.3.2020.07.30.07.49.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 30 Jul 2020 07:49:47 -0700 (PDT) Subject: Re: [PATCH] drm/amdgpu: Fix regression in adjusting power table/profile To: Alex Deucher , =?UTF-8?Q?Pawe=c5=82_Gronowski?= References: <20200729231106.GA6598@tower> From: Matt Coffin Autocrypt: addr=mcoffin13@gmail.com; keydata= mQINBFXzZLABEADfD/9dfQPD/Ho+NHBmduela1i/ZAuKmYkKHmu3xrqZvxguxzWPUgyJpTXh ok1xaJyKsPEyBE2ISWtO6E7daG9ugnU/k7wYb0/Yte+LZRI+ZdeM+ZOFuu3csHmxI65DNnFT swM7LLugTyJc2rvAAcEkQVAXXNnzmQHNcMpaGltsTM2YOlhR6+fO8QN96pD8lFr8nmC7Lg+W j88Lr54Eht5XaHAI+5d54Q4kuXxaX0IVMClO2w3+zeEmSR7mnIpypVqGuI8ermGpPnF64bkm erzCee0uWX/H9Rc2MBBCHC/xFSZUzMX+Duu+M3V7WhFJSXjP2f5p+koTrxEZlbv4+kOM4DUu SMWyXcqkWDLnXJrcT9E9M6++ysIGx64dy22ZvOqooh38qWWbA2cbdLEk+MvQ8N2uiTnQQ4hK gjwl0MiRZ9VilfKsolAUOWsvAjCuXr2Lh0srGwUkPwyosCTbQWGCnHUMCOpImMxzVUIQqruo 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Message-ID: <91bb8e22-9a8d-6b17-f40c-ab7a09a60fa8@gmail.com> Date: Thu, 30 Jul 2020 08:49:41 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alex Deucher , amd-gfx list Content-Type: multipart/mixed; boundary="===============0705184040==" Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============0705184040== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="yfkNuY739VaJTx8hpfvWAE7ZM8fVStDnO" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --yfkNuY739VaJTx8hpfvWAE7ZM8fVStDnO Content-Type: multipart/mixed; boundary="jPWW8Q1IvVkc2R7nYotymNUwN3OaH03PP" --jPWW8Q1IvVkc2R7nYotymNUwN3OaH03PP Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable Hello all, I just did some testing with this applied, and while it no longer returns -EINVAL, running `sudo sh -c 'echo "vc 2 2150 1195" > /sys/class/drm/card1/device/pp_od_clk_voltage'` results in `sh` spiking to, and staying at 100% CPU usage, with no indicating information in `dmesg` from the kernel. It appeared to work at least ONCE, but potentially not after. This is not unique to Navi, and caused the problem on a POLARIS10 card as well. Sorry for the bad news, and thanks for any insight you may have, Matt Coffin On 7/29/20 8:53 PM, Alex Deucher wrote: > On Wed, Jul 29, 2020 at 10:20 PM Pawe=C5=82 Gronowski w= rote: >> >> Regression was introduced in commit 38e0c89a19fd >> ("drm/amdgpu: Fix NULL dereference in dpm sysfs handlers") which >> made the set_pp_od_clk_voltage and set_pp_power_profile_mode return >> -EINVAL for previously valid input. This was caused by an empty >> string (starting at the \0 character) being passed to the kstrtol. >> >> Signed-off-by: Pawe=C5=82 Gronowski >=20 > Applied. Thanks! >=20 > Alex >=20 >> --- >> drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 9 +++++++-- >> 1 file changed, 7 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/= amd/amdgpu/amdgpu_pm.c >> index ebb8a28ff002..cbf623ff03bd 100644 >> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c >> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c >> @@ -778,12 +778,14 @@ static ssize_t amdgpu_set_pp_od_clk_voltage(stru= ct device *dev, >> tmp_str++; >> while (isspace(*++tmp_str)); >> >> - while ((sub_str =3D strsep(&tmp_str, delimiter)) !=3D NULL) { >> + while ((sub_str =3D strsep(&tmp_str, delimiter)) && *sub_str) = { >> ret =3D kstrtol(sub_str, 0, ¶meter[parameter_size]= ); >> if (ret) >> return -EINVAL; >> parameter_size++; >> >> + if (!tmp_str) >> + break; >> while (isspace(*tmp_str)) >> tmp_str++; >> } >> @@ -1635,11 +1637,14 @@ static ssize_t amdgpu_set_pp_power_profile_mod= e(struct device *dev, >> i++; >> memcpy(buf_cpy, buf, count-i); >> tmp_str =3D buf_cpy; >> - while ((sub_str =3D strsep(&tmp_str, delimiter)) !=3D = NULL) { >> + while ((sub_str =3D strsep(&tmp_str, delimiter)) && *s= ub_str) { >> ret =3D kstrtol(sub_str, 0, ¶meter[paramet= er_size]); >> if (ret) >> return -EINVAL; >> parameter_size++; >> + >> + if (!tmp_str) >> + break; >> while (isspace(*tmp_str)) >> tmp_str++; >> } >> -- >> 2.25.1 >> >> _______________________________________________ >> amd-gfx mailing list >> amd-gfx@lists.freedesktop.org >> https://lists.freedesktop.org/mailman/listinfo/amd-gfx > _______________________________________________ > amd-gfx mailing list > amd-gfx@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/amd-gfx >=20 --jPWW8Q1IvVkc2R7nYotymNUwN3OaH03PP-- --yfkNuY739VaJTx8hpfvWAE7ZM8fVStDnO Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEwz6NkrTNYgbdBT2N4mzKau7FyAcFAl8i3goACgkQ4mzKau7F yAfdABAArZbauXrcv8K7UureP6oxUytSuGy2jcxz8jU//LQBoTmziqeStyJuqT3i OQQQS7WDd3KJUiEpRVyJHNyWjN5yF5GvRzZL8V3UHKBp/YDMsjyublji1qS2Rvw6 f0gCydodbMlyWXYRGt5LDqyQF2k7+HqcOK4Nmbq0ETwRca/IE0gN23D3RfdIDhF+ Tt22yrgYXDQav8vQEWdCI4OPmJXm9eKOqV1vbaSQ60x1gDBmXXPTUZokRwd+6na2 DQHGRk1LAqTAcnWbAk9Le3eQYPwue7vAG1Aw1fsXXOMKpo2BUW7zH88yIOIvkt7c iC7KRbcseZtqRjNRubxcqb4rdbcf8TecSft7EstTKm1RfYwTcsMKcsCEgy46RAFV j41m4geA9+VLoN4TT9q78aBnNBDD7iLCx3WG3tTN9aQSCLKReFeVvpXyysejNqo9 to799aV8pTXAoKGnncn/QTG4pyAxfdDGafMwAp9OZ41PjQukrrwZ/21rsGc0r2yj fUltommo2pHvAimbR3BP+/sXOwXrWZ5yvOwr68Jyrl9n75IhaDzxbr3RCN+UnbM1 HmdyDYno/vMD0N8N1c5+mKnCuCKO5LTWQ9iTrBlv0g9cP2vPgro5SvmNsslfWUUS Xton3e91vghXk554/+Igja7C7CJQ80hXXZy/iETs0402j1qtQac= =S3jU -----END PGP SIGNATURE----- --yfkNuY739VaJTx8hpfvWAE7ZM8fVStDnO-- --===============0705184040== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx --===============0705184040==--