/* * Generic driver for AD1848/AD1847/CS4248 chips (0.1 Alpha) * Copyright (c) by Tugrul Galatali , * Jaroslav Kysela * Based on card-4232.c by Jaroslav Kysela * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include #include #include #include #include #include #include #include #define CRD_NAME "Generic AD1848/AD1847/CS4248" #define DEV_NAME "ad1848" MODULE_DESCRIPTION(CRD_NAME); MODULE_AUTHOR("Tugrul Galatali , Jaroslav Kysela "); MODULE_LICENSE("GPL"); MODULE_SUPPORTED_DEVICE("{{Analog Devices,AD1848}," "{Analog Devices,AD1847}," "{Crystal Semiconductors,CS4248}}"); static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */ static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* PnP setup */ static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 5,7,9,11,12,15 */ static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA; /* 0,1,3,5,6,7 */ static bool thinkpad[SNDRV_CARDS]; /* Thinkpad special case */ module_param_array(index, int, NULL, 0444); MODULE_PARM_DESC(index, "Index value for " CRD_NAME " soundcard."); module_param_array(id, charp, NULL, 0444); MODULE_PARM_DESC(id, "ID string for " CRD_NAME " soundcard."); module_param_array(enable, bool, NULL, 0444); MODULE_PARM_DESC(enable, "Enable " CRD_NAME " soundcard."); module_param_array(port, long, NULL, 0444); MODULE_PARM_DESC(port, "Port # for " CRD_NAME " driver."); module_param_array(irq, int, NULL, 0444); MODULE_PARM_DESC(irq, "IRQ # for " CRD_NAME " driver."); module_param_array(dma1, int, NULL, 0444); MODULE_PARM_DESC(dma1, "DMA1 # for " CRD_NAME " driver."); module_param_array(thinkpad, bool, NULL, 0444); MODULE_PARM_DESC(thinkpad, "Enable only for the onboard CS4248 of IBM Thinkpad 360/750/755 series."); static int snd_ad1848_match(struct device *dev, unsigned int n) { if (!enable[n]) return 0; if (port[n] == SNDRV_AUTO_PORT) { dev_err(dev, "please specify port\n"); return 0; } if (irq[n] == SNDRV_AUTO_IRQ) { dev_err(dev, "please specify irq\n"); return 0; } if (dma1[n] == SNDRV_AUTO_DMA) { dev_err(dev, "please specify dma1\n"); return 0; } return 1; } static int snd_ad1848_probe(struct device *dev, unsigned int n) { struct snd_card *card; struct snd_wss *chip; int error; error = snd_card_new(dev, index[n], id[n], THIS_MODULE, 0, &card); if (error < 0) return error; error = snd_wss_create(card, port[n], -1, irq[n], dma1[n], -1, thinkpad[n] ? WSS_HW_THINKPAD : WSS_HW_DETECT, 0, &chip); if (error < 0) goto out; card->private_data = chip; error = snd_wss_pcm(chip, 0); if (error < 0) goto out; error = snd_wss_mixer(chip); if (error < 0) goto out; strcpy(card->driver, "AD1848"); strcpy(card->shortname, chip->pcm->name); sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d", chip->pcm->name, chip->port, irq[n], dma1[n]); if (thinkpad[n]) strcat(card->longname, " [Thinkpad]"); error = snd_card_register(card); if (error < 0) goto out; dev_set_drvdata(dev, card); return 0; out: snd_card_free(card); return error; } static int snd_ad1848_remove(struct device *dev, unsigned int n) { snd_card_free(dev_get_drvdata(dev)); return 0; } #ifdef CONFIG_PM static int snd_ad1848_suspend(struct device *dev, unsigned int n, pm_message_t state) { struct snd_card *card = dev_get_drvdata(dev); struct snd_wss *chip = card->private_data; snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); chip->suspend(chip); return 0; } static int snd_ad1848_resume(struct device *dev, unsigned int n) { struct snd_card *card = dev_get_drvdata(dev); struct snd_wss *chip = card->private_data; chip->resume(chip); snd_power_change_state(card, SNDRV_CTL_POWER_D0); return 0; } #endif static struct isa_driver snd_ad1848_driver = { .match = snd_ad1848_match, .probe = snd_ad1848_probe, .remove = snd_ad1848_remove, #ifdef CONFIG_PM .suspend = snd_ad1848_suspend, .resume = snd_ad1848_resume, #endif .driver = { .name = DEV_NAME } }; module_isa_driver(snd_ad1848_driver, SNDRV_CARDS); >authorArvind Yadav <arvind.yadav.cs@gmail.com>2016-12-12 23:13:27 +0530 committerTejun Heo <tj@kernel.org>2017-01-06 15:45:32 -0500 commit064c3db9c564cc5be514ac21fb4aa26cc33db746 (patch) tree9875da27d40d874837ecca529ba42e54bcc56b10 /drivers/usb/common/ulpi.c parent2dae99558e86894e9e5dbf097477baaa5eb70134 (diff)
ata: sata_mv:- Handle return value of devm_ioremap.
Here, If devm_ioremap will fail. It will return NULL. Then hpriv->base = NULL - 0x20000; Kernel can run into a NULL-pointer dereference. This error check will avoid NULL pointer dereference. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/usb/common/ulpi.c')