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Commit e5c34a1a authored by Matthias Beyer's avatar Matthias Beyer Committed by Greg Kroah-Hartman
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Staging: bcm: Outsourced IsFlash2x() handling 



This patch outsources the code from the IsFlash2x() check in
bcm_char_ioctl_nvm_rw() function to shorten it.

Signed-off-by: default avatarMatthias Beyer <mail@beyermatthias.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 8224ac2a

drivers/staging/bcm/Bcmchar.c

+55 −43
Original line number Diff line number Diff line
@@ -39,6 +39,56 @@ static int bcm_handle_nvm_read_cmd(struct bcm_mini_adapter *Adapter, 
	return STATUS_SUCCESS;

}



static int handle_flash2x_adapter(struct bcm_mini_adapter *Adapter,

	PUCHAR pReadData, struct bcm_nvm_readwrite *stNVMReadWrite)

{

	/*

	 * New Requirement:-

	 * DSD section updation will be allowed in two case:-

	 * 1.  if DSD sig is present in DSD header means dongle

	 * is ok and updation is fruitfull

	 * 2.  if point 1 failes then user buff should have

	 * DSD sig. this point ensures that if dongle is

	 * corrupted then user space program first modify

	 * the DSD header with valid DSD sig so that this

	 * as well as further write may be worthwhile.

	 *

	 * This restriction has been put assuming that

	 * if DSD sig is corrupted, DSD data won't be

	 * considered valid.

	 */

	INT Status;

	ULONG ulDSDMagicNumInUsrBuff = 0;



	Status = BcmFlash2xCorruptSig(Adapter, Adapter->eActiveDSD);

	if (Status == STATUS_SUCCESS)

		return STATUS_SUCCESS;



	if (((stNVMReadWrite->uiOffset + stNVMReadWrite->uiNumBytes) !=

			Adapter->uiNVMDSDSize) ||

			(stNVMReadWrite->uiNumBytes < SIGNATURE_SIZE)) {



		BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, OSAL_DBG, DBG_LVL_ALL,

				"DSD Sig is present neither in Flash nor User provided Input..");

		up(&Adapter->NVMRdmWrmLock);

		kfree(pReadData);

		return Status;

	}



	ulDSDMagicNumInUsrBuff =

		ntohl(*(PUINT)(pReadData + stNVMReadWrite->uiNumBytes -

		      SIGNATURE_SIZE));

	if (ulDSDMagicNumInUsrBuff != DSD_IMAGE_MAGIC_NUMBER) {

		BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS, OSAL_DBG, DBG_LVL_ALL,

				"DSD Sig is present neither in Flash nor User provided Input..");

		up(&Adapter->NVMRdmWrmLock);

		kfree(pReadData);

		return Status;

	}



	return STATUS_SUCCESS;

}



/***************************************************************

* Function	  - bcm_char_open()

*
@@ -1437,7 +1487,6 @@ static int bcm_char_ioctl_nvm_rw(void __user *argp, 
	struct timeval tv0, tv1;

	struct bcm_ioctl_buffer IoBuffer;

	PUCHAR pReadData = NULL;

	ULONG ulDSDMagicNumInUsrBuff = 0;

	INT Status = STATUS_FAILURE;



	memset(&tv0, 0, sizeof(struct timeval));
@@ -1508,48 +1557,11 @@ static int bcm_char_ioctl_nvm_rw(void __user *argp, 


		Adapter->bHeaderChangeAllowed = TRUE;

		if (IsFlash2x(Adapter)) {

			/*

			 * New Requirement:-

			 * DSD section updation will be allowed in two case:-

			 * 1.  if DSD sig is present in DSD header means dongle

			 * is ok and updation is fruitfull

			 * 2.  if point 1 failes then user buff should have

			 * DSD sig. this point ensures that if dongle is

			 * corrupted then user space program first modify

			 * the DSD header with valid DSD sig so that this

			 * as well as further write may be worthwhile.

			 *

			 * This restriction has been put assuming that

			 * if DSD sig is corrupted, DSD data won't be

			 * considered valid.

			 */



			Status = BcmFlash2xCorruptSig(Adapter,

				Adapter->eActiveDSD);

			if (Status != STATUS_SUCCESS) {

				if (((stNVMReadWrite.uiOffset + stNVMReadWrite.uiNumBytes) !=

					Adapter->uiNVMDSDSize) ||

					(stNVMReadWrite.uiNumBytes < SIGNATURE_SIZE)) {



					BCM_DEBUG_PRINT(Adapter, DBG_TYPE_OTHERS,

						OSAL_DBG, DBG_LVL_ALL,

						"DSD Sig is present neither in Flash nor User provided Input..");

					up(&Adapter->NVMRdmWrmLock);

					kfree(pReadData);

					return Status;

				}



				ulDSDMagicNumInUsrBuff = ntohl(*(PUINT)(pReadData + stNVMReadWrite.uiNumBytes - SIGNATURE_SIZE));

				if (ulDSDMagicNumInUsrBuff !=

					DSD_IMAGE_MAGIC_NUMBER) {

					BCM_DEBUG_PRINT(Adapter,

					DBG_TYPE_OTHERS, OSAL_DBG, DBG_LVL_ALL,

						"DSD Sig is present neither in Flash nor User provided Input..");

					up(&Adapter->NVMRdmWrmLock);

					kfree(pReadData);

					return Status;

				}

			}

			int ret = handle_flash2x_adapter(Adapter,

							pReadData,

							&stNVMReadWrite);

			if (ret != STATUS_SUCCESS)

				return ret;

		}



		Status = BeceemNVMWrite(Adapter, (PUINT)pReadData,