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Commit 36b58c13 authored by Himateja Reddy's avatar Himateja Reddy
Browse files

msm: adsprpc: remove use of vfs_stat API in the fastrpc driver 



Currently, to check if a particular DSP is supported, vfs_stat on
its device file is done in the kernel. Remove the usage of this
API for GKI compliance.

Change-Id: I5660ddd975354563bf319cefe931d5eac488191e
Acked-by: default avatarThyagarajan Venkatanarayanan <venkatan@qti.qualcomm.com>
Signed-off-by: default avatarHimateja Reddy <hmreddy@codeaurora.org>
parent 2f9b2b41

drivers/char/adsprpc.c

+4 −40
Original line number Diff line number Diff line
@@ -16,7 +16,6 @@ 
#include <linux/completion.h>

#include <linux/pagemap.h>

#include <linux/mm.h>

#include <linux/fs.h>

#include <linux/wait.h>

#include <linux/sched.h>

#include <linux/module.h>
@@ -32,7 +31,6 @@ 
#include <soc/qcom/service-notifier.h>

#include <soc/qcom/service-locator.h>

#include <linux/scatterlist.h>

#include <linux/fs.h>

#include <linux/uaccess.h>

#include <linux/device.h>

#include <linux/of.h>
@@ -3516,19 +3514,6 @@ static int fastrpc_init_process(struct fastrpc_file *fl, 
	return err;

}



static int fastrpc_kstat(const char *filename, struct kstat *stat)

{

	int result;

	mm_segment_t fs_old;



	fs_old = get_fs();

	set_fs(KERNEL_DS);

	result = vfs_stat((const char __user *)filename, stat);

	set_fs(fs_old);



	return result;

}



static int fastrpc_send_cpuinfo_to_dsp(struct fastrpc_file *fl)

{

	int err = 0;
@@ -3571,35 +3556,14 @@ static int fastrpc_get_info_from_dsp(struct fastrpc_file *fl, 
				uint32_t dsp_attr_buf_len,

				uint32_t domain)

{

	int err = 0, dsp_support = 0;

	int err = 0;

	struct fastrpc_ioctl_invoke_async ioctl;

	remote_arg_t ra[2];

	struct kstat sb;



	// Querying device about DSP support

	switch (domain) {

	case ADSP_DOMAIN_ID:

		if (!fastrpc_kstat("/dev/subsys_adsp", &sb))

			dsp_support = 1;

		break;

	case MDSP_DOMAIN_ID:

		//Modem not supported for fastRPC

		break;

	case SDSP_DOMAIN_ID:

		if (!fastrpc_kstat("/dev/subsys_slpi", &sb))

			dsp_support = 1;

		break;

	case CDSP_DOMAIN_ID:

		if (!fastrpc_kstat("/dev/subsys_cdsp", &sb))

			dsp_support = 1;

		break;

	default:

		dsp_support = 0;

		break;

	}

	dsp_attr_buf[0] = dsp_support;

	dsp_attr_buf[0] = 0;	// Capability filled in userspace



	if (dsp_support == 0)

	// Fastrpc to modem not supported

	if (domain == MDSP_DOMAIN_ID)

		goto bail;



	err = fastrpc_channel_open(fl);