[PATCH4/4] [POWERPC] Fix cpm_uart driver

[Jochen Friedrich <jochen@scram.de>]

In cpm_uart_core, functions cpm_uart_init_bd and cpm_uart_init_scc
an offset into DP RAM is calculated by substracting a physical
memory constant from an virtual address. This patch fixes the
problem by converting the virtual address into a physical
first.

Signed-off-by: Jochen Friedrich <jochen@scram.de>
---
drivers/serial/cpm_uart/cpm_uart_core.c |   12 ++++++++----
1 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/serial/cpm_uart/cpm_uart_core.c b/drivers/serial/cpm_uart/cpm_uart_core.c
index cefde58..7f5db7c 100644
--- a/drivers/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/serial/cpm_uart/cpm_uart_core.c
@@ -752,8 +752,10 @@ static void cpm_uart_init_scc(struct uart_cpm_port *pinfo)
 	sup = pinfo->sccup;
 
 	/* Store address */
-	pinfo->sccup->scc_genscc.scc_rbase = (unsigned char *)pinfo->rx_bd_base - DPRAM_BASE;
-	pinfo->sccup->scc_genscc.scc_tbase = (unsigned char *)pinfo->tx_bd_base - DPRAM_BASE;
+	pinfo->sccup->scc_genscc.scc_rbase = 
+		(u_char *)cpm_dpram_phys((u8 *)pinfo->rx_bd_base) - DPRAM_BASE;
+	pinfo->sccup->scc_genscc.scc_tbase = 
+		(u_char *)cpm_dpram_phys((u8 *)pinfo->tx_bd_base) - DPRAM_BASE;
 
 	/* Set up the uart parameters in the
 	 * parameter ram.
@@ -813,8 +815,10 @@ static void cpm_uart_init_smc(struct uart_cpm_port *pinfo)
 	up = pinfo->smcup;
 
 	/* Store address */
-	pinfo->smcup->smc_rbase = (u_char *)pinfo->rx_bd_base - DPRAM_BASE;
-	pinfo->smcup->smc_tbase = (u_char *)pinfo->tx_bd_base - DPRAM_BASE;
+	pinfo->smcup->smc_rbase = 
+		(u_char *)cpm_dpram_phys((u8 *)pinfo->rx_bd_base) - DPRAM_BASE;
+	pinfo->smcup->smc_tbase = 
+		(u_char *)cpm_dpram_phys((u8 *)pinfo->tx_bd_base) - DPRAM_BASE;
 
 /*
  *  In case SMC1 is being relocated...