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https://github.com/edk2-porting/linux-next.git
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7a0786c19d
The DVB binding schema at the DVB core assumes that the frontend is a
separate driver. Faling to do that causes OOPS when the module is
removed, as it tries to do a symbol_put_addr on an internal symbol,
causing craches like:
WARNING: CPU: 1 PID: 28102 at kernel/module.c:1108 module_put+0x57/0x70
Modules linked in: dvb_usb_gp8psk(-) dvb_usb dvb_core nvidia_drm(PO) nvidia_modeset(PO) snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer snd soundcore nvidia(PO) [last unloaded: rc_core]
CPU: 1 PID: 28102 Comm: rmmod Tainted: P WC O 4.8.4-build.1 #1
Hardware name: MSI MS-7309/MS-7309, BIOS V1.12 02/23/2009
Call Trace:
dump_stack+0x44/0x64
__warn+0xfa/0x120
module_put+0x57/0x70
module_put+0x57/0x70
warn_slowpath_null+0x23/0x30
module_put+0x57/0x70
gp8psk_fe_set_frontend+0x460/0x460 [dvb_usb_gp8psk]
symbol_put_addr+0x27/0x50
dvb_usb_adapter_frontend_exit+0x3a/0x70 [dvb_usb]
From Derek's tests:
"Attach bug is fixed, tuning works, module unloads without
crashing. Everything seems ok!"
Reported-by: Derek <user.vdr@gmail.com>
Tested-by: Derek <user.vdr@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
83 lines
3.0 KiB
C
83 lines
3.0 KiB
C
/*
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* gp8psk_fe driver
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef GP8PSK_FE_H
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#define GP8PSK_FE_H
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#include <linux/types.h>
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/* gp8psk commands */
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#define GET_8PSK_CONFIG 0x80 /* in */
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#define SET_8PSK_CONFIG 0x81
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#define I2C_WRITE 0x83
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#define I2C_READ 0x84
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#define ARM_TRANSFER 0x85
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#define TUNE_8PSK 0x86
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#define GET_SIGNAL_STRENGTH 0x87 /* in */
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#define LOAD_BCM4500 0x88
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#define BOOT_8PSK 0x89 /* in */
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#define START_INTERSIL 0x8A /* in */
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#define SET_LNB_VOLTAGE 0x8B
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#define SET_22KHZ_TONE 0x8C
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#define SEND_DISEQC_COMMAND 0x8D
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#define SET_DVB_MODE 0x8E
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#define SET_DN_SWITCH 0x8F
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#define GET_SIGNAL_LOCK 0x90 /* in */
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#define GET_FW_VERS 0x92
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#define GET_SERIAL_NUMBER 0x93 /* in */
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#define USE_EXTRA_VOLT 0x94
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#define GET_FPGA_VERS 0x95
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#define CW3K_INIT 0x9d
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/* PSK_configuration bits */
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#define bm8pskStarted 0x01
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#define bm8pskFW_Loaded 0x02
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#define bmIntersilOn 0x04
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#define bmDVBmode 0x08
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#define bm22kHz 0x10
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#define bmSEL18V 0x20
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#define bmDCtuned 0x40
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#define bmArmed 0x80
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/* Satellite modulation modes */
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#define ADV_MOD_DVB_QPSK 0 /* DVB-S QPSK */
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#define ADV_MOD_TURBO_QPSK 1 /* Turbo QPSK */
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#define ADV_MOD_TURBO_8PSK 2 /* Turbo 8PSK (also used for Trellis 8PSK) */
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#define ADV_MOD_TURBO_16QAM 3 /* Turbo 16QAM (also used for Trellis 8PSK) */
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#define ADV_MOD_DCII_C_QPSK 4 /* Digicipher II Combo */
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#define ADV_MOD_DCII_I_QPSK 5 /* Digicipher II I-stream */
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#define ADV_MOD_DCII_Q_QPSK 6 /* Digicipher II Q-stream */
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#define ADV_MOD_DCII_C_OQPSK 7 /* Digicipher II offset QPSK */
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#define ADV_MOD_DSS_QPSK 8 /* DSS (DIRECTV) QPSK */
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#define ADV_MOD_DVB_BPSK 9 /* DVB-S BPSK */
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/* firmware revision id's */
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#define GP8PSK_FW_REV1 0x020604
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#define GP8PSK_FW_REV2 0x020704
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#define GP8PSK_FW_VERS(_fw_vers) \
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((_fw_vers)[2]<<0x10 | (_fw_vers)[1]<<0x08 | (_fw_vers)[0])
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struct gp8psk_fe_ops {
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int (*in)(void *priv, u8 req, u16 value, u16 index, u8 *b, int blen);
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int (*out)(void *priv, u8 req, u16 value, u16 index, u8 *b, int blen);
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int (*reload)(void *priv);
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};
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struct dvb_frontend *gp8psk_fe_attach(const struct gp8psk_fe_ops *ops,
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void *priv, bool is_rev1);
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#endif
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